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1.
Chao Yang Jianrui Feng Fan Lv Jinhui Zhou Chunfu Lin Kai Wang Yelong Zhang Yong Yang Wei Wang Jianbao Li Shaojun Guo 《Advanced materials (Deerfield Beach, Fla.)》2018,30(27)
Potassium‐ion batteries (KIBs) are receiving increasing interest in grid‐scale energy storage owing to the earth abundant and low cost of potassium resources. However, their development still stays at the infancy stage due to the lack of suitable electrode materials with reversible depotassiation/potassiation behavior, resulting in poor rate performance, low capacity, and cycling stability. Herein, the first example of synthesizing single‐crystalline metallic graphene‐like VSe2 nanosheets for greatly boosting the performance of KIBs in term of capacity, rate capability, and cycling stability is reported. Benefiting from the unique 2D nanostructure, high electron/K+‐ion conductivity, and outstanding pseudocapacitance effects, ultrathin VSe2 nanosheets show a very high reversible capacity of 366 mAh g?1 at 100 mA g?1, a high rate capability of 169 mAh g?1 at 2000 mA g?1, and a very low decay of 0.025% per cycle over 500 cycles, which are the best in all the reported anode materials in KIBs. The first‐principles calculations reveal that VSe2 nanosheets have large adsorption energy and low diffusion barriers for the intercalation of K+‐ion. Ex situ X‐ray diffraction analysis indicates that VSe2 nanosheets undertake a reversible phase evolution by initially proceeding with the K+‐ion insertion within VSe2 layers, followed by the conversion reaction mechanism. 相似文献
2.
Yulian Dong Jingyao Huo Changfan Xu Deyang Ji Huaping Zhao Liqiang Li Yong Lei 《Advanced Materials Technologies》2024,9(11):2301840
Considering environmental changes and the demand for more sustainable energy sources, stricter requirements have been placed on electrode materials for sodium and potassium-ion batteries, which are expected to provide higher energy and power density while being affordable and sustainable. Vanadium sulfide-based materials have emerged as intriguing contenders for the next generation of anode materials due to their high theoretical capacity, abundant reserves, and cost-effectiveness. Despite these advantages, challenges such as limited cycle life and restricted ion diffusion coefficients continue to impede their effective application in sodium and potassium-ion batteries. To overcome the limitations associated with electrochemical performance and circumvent bottlenecks imposed by the inherent properties of materials at the bulk scale, this review comprehensively summarizes and analyzes the crystal structures, modification strategies, and energy storage processes of vanadium sulfide-based electrode materials for sodium and potassium-ion batteries. The objective is to guide the development of high-performance vanadium-based sulfide electrode materials with refined morphologies and/or structures, employing environmentally friendly and cost-efficient methods. Finally, future perspectives and research suggestions for vanadium sulfide-based materials are presented to propel practical applications forward. 相似文献
3.
在二氧化硅微球表面包覆一层酚醛树脂并在高温下将其转化为碳壳,然后进行溶剂热反应、多巴胺包覆、高温硫化以及氢氧化钠刻蚀,制备出碗状C@FeS2@NC(氮掺杂碳层)复合材料。这种复合材料具有开放性三维碗状结构,能释放体积变化产生的应力,其较大的比表面积(70.67 m2·g-1)有很多的活性点位。内外双层碳壳提高了这种复合材料的导电性并提供了稳定的机械结构,外层NC具有很好的保护作用。将这种复合材料用作锂离子电池负极,在0.2 A·g-1电流密度下首圈放电比容量和充电比容量分别为954.3 mAh·g-1和847.2 mAh·g-1,对应的首圈库伦效率为88.78%。循环100圈后,其放电比容量稳定在793.8 mAh·g-1。 相似文献
4.
Chengzhi Zhang Fei Wang Fei Han Huang Wu Fuquan Zhang Guanhua Zhang Jinshui Liu 《Advanced Materials Interfaces》2020,7(13)
Transition‐metal sulfides (TMSs) are extensively investigated as anodes of low‐cost sodium‐ion batteries (SIBs) and potassium‐ion batteries (KIBs) due to their abundant resources and high theoretical capacity. However, their poor cyclability and low initial coulombic efficiency (ICE) in ester‐based electrolytes severely impede their application in SIBs and KIBs. To overcome these drawbacks, ether‐based electrolytes are considered as alternatives, but its fundamental principle remains rarely reported and poorly understood. Herein, the electrochemical performance of MoS2@C electrodes is explored using both carbonate and ether‐based solvents. The MoS2@C exhibits a higher ICE and Na/K‐ion storage capacity (a reversible specific capacity of 625 mAh g−1 with ICE of 80% for SIBs, and a capacity of 241 mAh g−1 with ICE of 81% for KIBs, respectively) in dimethyl ether (DME) electrolytes than in ethylene carbonate and diethylene carbonate (EC/DEC) electrolytes. Experimental measurements and theoretical calculation show that the DME electrolytes help to optimize the solid‐electrolyte interphase (SEI) composition, facilitate charge transport, reduce the energy barrier for Na/K‐ions migration and reinforcing geometry architecture, thus endowing excellent electrochemical performance. Importantly, this electrolyte optimization solution can be extended to other TMSs, such as Fe7S8@C anodes, demonstrating an exact match between the TMSs and DME electrolytes. 相似文献
5.
Ying Wu Hai‐Bo Huang Yuezhan Feng Zhong‐Shuai Wu Yan Yu 《Advanced materials (Deerfield Beach, Fla.)》2019,31(50)
Potassium‐ion batteries (KIBs) are a core energy storage device that can meet the need for scalable and affordable stationary applications because they use low‐cost and earth‐abundant potassium. In addition, KIB shares a similar storage mechanism with current Li‐ion batteries. As the key to optimizing a battery's performance, the development of high‐performance electrode materials helps to increase the feasibility of KIB technology. In this sense, phosphorus‐based materials (i.e., phosphorus and metal phosphide) with high theoretical capacity and low redox potential tick all the right boxes as a material of choice. A rapid glimpse at recent studies on phosphorus‐based anode materials for advanced KIBs is provided, covering the synthetic methods, reaction mechanisms, electrochemical properties, and performances. In addition, several promising strategies are highlighted to address the imminent challenges faced by phosphorus‐based anode materials, hoping to cast an insightful outlook for possible future direction in this field. 相似文献
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7.
Kangzhe Cao Huiqiao Liu Wangyang Li Qingqing Han Zhang Zhang Kejing Huang Qiangshan Jing Lifang Jiao 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(36)
Potassium‐ion batteries (KIBs) are promising alternatives to lithium‐ion batteries because of the abundance and low cost of K. However, an important challenge faced by KIBs is the search for high‐capacity materials that can hold large‐diameter K ions. Herein, copper oxide (CuO) nanoplates are synthesized as high‐performance anode materials for KIBs. CuO nanoplates with a thickness of ≈20 nm afford a large electrode–electrolyte contact interface and short K+ ion diffusion distance. As a consequence, a reversible capacity of 342.5 mAh g?1 is delivered by the as‐prepared CuO nanoplate electrode at 0.2 A g?1. Even after 100 cycles at a high current density of 1.0 A g?1, the capacity of the electrode remains over 206 mAh g?1, which is among the best values for KIB anodes reported in the literature. Moreover, a conversion reaction occurs at the CuO anode. Cu nanoparticles form during the first potassiation process and reoxidize to Cu2O during the depotassiation process. Thereafter, the conversion reaction proceeds between the as‐formed Cu2O and Cu, yielding a reversible theoretical capacity of 374 mAh g?1. Considering their low cost, easy preparation, and environmental benignity, CuO nanoplates are promising KIB anode materials. 相似文献
8.
Zhongqiu Tong Rui Yang Shilin Wu Dong Shen Tianpeng Jiao Kaili Zhang Wenjun Zhang Chun‐Sing Lee 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(28)
Nanoscale surface‐engineering plays an important role in improving the performance of battery electrodes. Nb2O5 is one typical model anode material with promising high‐rate lithium storage. However, its modest reaction kinetics and low electrical conductivity obstruct the efficient storage of larger ions of sodium or potassium. In this work, partially surface‐amorphized and defect‐rich black niobium oxide@graphene (black Nb2O5?x@rGO) nanosheets are designed to overcome the above Na/K storage problems. The black Nb2O5?x@rGO nanosheets electrodes deliver a high‐rate Na and K storage capacity (123 and 73 mAh g?1, respectively at 3 A g?1) with long‐term cycling stability. Besides, both Na‐ion and K‐ion full batteries based on black Nb2O5?x@rGO nanosheets anodes and vanadate‐based cathodes (Na0.33V2O5 and K0.5V2O5 for Na‐ion and K‐ion full batteries, respectively) demonstrate promising rate and cycling performance. Notably, the K‐ion full battery delivers higher energy and power densities (172 Wh Kg?1 and 430 W Kg?1), comparable to those reported in state‐of‐the‐art K‐ion full batteries, accompanying with a capacity retention of ≈81.3% over 270 cycles. This result on Na‐/K‐ion batteries may pave the way to next‐generation post‐lithium batteries. 相似文献
9.
Shuya Wang Yongli Cui Bin Cui Quanchao Zhuang Bo Li Hong Zheng Zhicheng Ju 《Advanced Materials Interfaces》2019,6(24)
Potassium ion batteries (PIBs) are regarded as potentially promising large‐scale energy storage systems. δ‐MnO2/KMnF3‐30 (mass percentage of KMnF3: 30%) with mixed valence of manganese is constructed by homogeneous precipitation method, as cathode for PIBs. As a buffer and chelating agent for the reaction, disodium ethylenediamine tetraacetate (EDTA‐2Na) is helpful to form composites with good mixing and uniform dispersion. δ‐MnO2 nanowires with different lengths can fully utilize the cross‐linking of long nanowires and short‐range filling of short nanowires, resulting in more stable network connectivity. Additionally, the uniform embedding of the KMnF3 nanoparticles among δ‐MnO2 nanowires can effectively accommodate the volume expansion associated with ion intercalation during cycling process. δ‐MnO2/KMnF3 combines the advantages of Mn‐based fluoride and Mn‐based oxide as cathode materials, and has high capacity, good cycle performance and rate performance. The capacity at a current density of 100 mA g−1 after 200 cycles can still be as high as 90 mAh g−1. Electrochemical impedance spectroscopy is used to study the reaction process of the δ‐MnO2/KMnF3 cathode at the electrode/electrolyte interface and to explain some electrochemical phenomena. 相似文献
10.
Jaekyung Sung Jiyoung Ma Seong‐Hyeon Choi Jaehyung Hong Namhyung Kim Sujong Chae Yeonguk Son Sung Youb Kim Jaephil Cho 《Advanced materials (Deerfield Beach, Fla.)》2019,31(33)
The use of high‐capacity anode materials to overcome the energy density limits imposed by the utilization of low‐theoretical‐capacity conventional graphite has recently drawn increased attention. Until now, stress management (including strategies relying on size, surface coating, and free volume control) has been achieved by addressing the critical problems originating from significant anode volume expansion upon lithiation. However, commercially viable alternatives to graphite have not yet been found. A new stress‐management strategy relying on the use of a lamellar nanosphere Si anode is proposed. Specifically, nanospheres comprising ≈50 nm Si nanoparticles encapsulated by SiOx /Si/SiOx /C layers with thicknesses of <20 nm per layer are synthesized via one‐pot chemical vapor deposition in various atmospheres. SiOx is found to act as a stress management interlayer when it is located between Si and mitigates stress intensification on the surface layer, allowing nanospheres to maintain their morphological integrity and promoting the formation of a stable solid electrolyte interphase layer during cycling. When tested using an industrial protocol, a full cell comprising a nanosphere/graphite blended anode and a lithium cobalt oxide cathode achieve an average energy density of 2440.2 Wh L?1 (1.72 times higher than that of conventional graphite) with a capacity retention ratio of 80% after 101 cycles. 相似文献
11.
Sodium‐ion batteries (SIBs) have huge potential for applications in large‐scale energy storage systems due to their low cost and abundant sources. It is essential to develop new electrode materials for SIBs with high performance in terms of energy density, cycle life, and cost. Metal binary compounds that operate through conversion reactions hold promise as advanced anode materials for sodium storage. This Review highlights the storage mechanisms and advantages of conversion‐type anode materials and summarizes their recent development. Although conversion‐type anode materials have high theoretical capacities and abundant varieties, they suffer from multiple challenging obstacles to realize commercial applications, such as low reversible capacity, large voltage hysteresis, low initial coulombic efficiency, large volume changes, and low cycling stability. These key challenges are analyzed in this Review, together with emerging strategies to overcome them, including nanostructure and surface engineering, electrolyte optimization, and battery configuration designs. This Review provides pertinent insights into the prospects and challenges for conversion‐type anode materials, and will inspire their further study. 相似文献
12.
Carbonaceous materials as anodes usually exhibit low capacity for lithium ion batteries (LIBs) and sodium ion batteries (SIBs). Oxygen‐doped carbonaceous materials have the potential of high capacity and super rate performance. However, up to now, the reported oxygen‐doped carbonaceous materials usually exhibit inferior electrochemical performance. To overcome this problem, a high reactive oxygen‐doped 3D interdigital porous carbonaceous material is designed and synthesized through epitaxial growth method and used as anodes for LIBs and SIBs. It delivers high reversible capacity, super rate performance, and long cycling stability (473 mA h g?1after 500 cycles for LIBs and 223 mA h g?1 after 1200 cycles for SIBs, respectively, at the current density of 1000 mA g?1), with a capacity decay of 0.0214% per cycle for LIBs and 0.0155% per cycle for SIBs. The results demonstrate that constructing 3D interdigital porous structure with reactive oxygen functional groups can significantly enhance the electrochemical performance of oxygen‐doped carbonaceous material. 相似文献
13.
Lithium‐ion batteries (LIBs) have dominated the energy storage market for more than two decades; however, the quest for lower‐cost battery alternatives is rapidly expanding, especially for large‐scale applications. Sodium‐ion batteries (SIBs) have recently experienced an impressive resurgence owing to the earth's abundance of sodium resources and the similar electrochemistry of SIBs and the well‐established LIBs. Nonetheless, whereas cost‐effective and reliable graphite anodes have served as a cornerstone in current LIB technology, one of the major limitations of SIBs has been the inability to exploit graphite as an electrode because of its negligible sodium storage capability. Recently, however, clear progress has been made in preparing high‐performance graphitic carbon anodes for SIBs with new findings on the mechanisms of sodium storage. Herein, this paper aims to review the progress made in understanding the sodium storage mechanisms in graphitic carbon materials and comprehensively summarize the start‐of‐the‐art achievements by surveying the correlations among the type of graphitic material, microstructure, sodium storage mechanisms, and electrochemical performance in SIBs. In addition, perspectives related to practical applications, including the electrolyte, coulombic efficiency, and applicability in sodium‐ion full cells, are also presented. 相似文献
14.
The research of sodium/potassium‐ion batteries (SIBs/KIBs) still has some way to go but its success could possibly radically alter the way electricity is stored and used. As the key part of battery technology, advances in electrode materials are instrumental in accelerating the uptake of these renewable and innovative storage solutions. This is where metal chalcogenides (MCs) that tick all the right boxes can fit in to fill the gap. In this review, an overview is provided on the recent progress of MCs, with an emphasis on nanostructured metal sulfides and selenides, and the impact that metal chalcogenides may have on the future of SIBs and KIBs technology is discussed by taking a glimpse at the diverse set of properties inherent in them. In addition, several promising strategies are highlighted to address the imminent challenges faced by MCs in SIBs and KIBs, hoping to cast an insightful outlook for possible future direction in this field. 相似文献
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16.
Ting Wang Hangang Li Shaojun Shi Ting Liu Gang Yang Yimin Chao Fan Yin 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(20)
MnO as anode materials has received particular interest owing to its high specific capacity, abundant resources, and low cost. However, serious problems related to the large volume change (>170%) during the lithiation/delithiation processes still results in poor rate capability and fast capacity decay. With homogenous crystals of MnO grown in the network of carbon nanofibers (CNF), binding effect of CNF can effectively weaken the volume change of MnO during cycles. In this work, a CNF/MnO flexible electrode for lithium‐ion batteries is designed and synthesized. The CNF play the roles of conductive channel and elastically astricting MnO particles during lithiation/delithiation. CNF/MnO as binder‐free anode delivers specific capacity of 983.8 mAh g?1 after 100th cycle at a current density of 0.2 A g?1, and 600 mAh g?1 at 1 A g?1 which are much better than those of pure MnO and pure CNF. The ex‐situ morphologies clearly show the relative volume change of MnO/CNF as anode under various discharging and charging times. CNF can elastically buffer the volume change of MnO during charging/discharging cycles. A facile and scalable approach for synthesizing a novel flexible binder‐free anode of CNF/MnO for potential application in highly reversible lithium storage devices is presented. 相似文献
17.
竹碳的结构及电化学性能研究 总被引：4，自引：0，他引：4
用XRD、SEM和EDS对由天然竹子烧制而成的竹碳进行了组织结构表征。表明竹碳主要呈无定形碳结构 ,并含有钾等金属元素。对竹碳的电化学嵌脱锂性能进行了初步的研究 ,竹碳的首次嵌锂容量约 2 0 0mAh g ,但不可逆容量较大。除去竹碳中的钾等金属离子并进行球磨处理 ,竹碳的首次嵌锂容量超过 4 0 0mAh g ,经过几次充放电循环以后 ,处理后的竹碳显示出良好的充放电效率。 相似文献
18.
Xiangjun Pu Huiming Wang Dong Zhao Hanxi Yang Xinping Ai Shunan Cao Zhongxue Chen Yuliang Cao 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(32)
The increasing demands for renewable energy to substitute traditional fossil fuels and related large‐scale energy storage systems (EES) drive developments in battery technology and applications today. The lithium‐ion battery (LIB), the trendsetter of rechargeable batteries, has dominated the market for portable electronics and electric vehicles and is seeking a participant opportunity in the grid‐scale battery market. However, there has been a growing concern regarding the cost and resource availability of lithium. The sodium‐ion battery (SIB) is regarded as an ideal battery choice for grid‐scale EES owing to its similar electrochemistry to the LIB and the crust abundance of Na resources. Because of the participation in frequency regulation, high pulse‐power capability is essential for the implanted SIBs in EES. Herein, a comprehensive overview of the recent advances in the exploration of high‐power cathode and anode materials for SIB is presented, and deep understanding of the inherent host structure, sodium storage mechanism, Na+ diffusion kinetics, together with promising strategies to promote the rate performance is provided. This work may shed light on the classification and screening of alternative high rate electrode materials and provide guidance for the design and application of high power SIBs in the future. 相似文献
19.
Shuoqing Zhao Liubing Dong Bing Sun Kang Yan Jinqiang Zhang Shuwei Wan Fengrong He Paul Munroe Peter H. L. Notten Guoxiu Wang 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(4)
Benefiting from the natural abundance and low standard redox potential of potassium, potassium‐ion batteries (PIBs) are regarded as one of the most promising alternatives to lithium‐ion batteries for low‐cost energy storage. However, most PIB electrode materials suffer from sluggish thermodynamic kinetics and dramatic volume expansion during K+ (de)intercalation. Herein, it is reported on carbon‐coated K2Ti2O5 microspheres (S‐KTO@C) synthesized through a facile spray drying method. Taking advantage of both the porous microstructure and carbon coating, S‐KTO@C shows excellent rate capability and cycling stability as an anode material for PIBs. Furthermore, the intimate integration of carbon coating through chemical vapor deposition technology significantly enhances the K+ intercalation pseudocapacitive behavior. As a proof of concept, a potassium‐ion hybrid capacitor is constructed with the S‐KTO@C (battery‐type anode material) and the activated carbon (capacitor‐type cathode material). The assembled device shows a high energy density, high power density, and excellent capacity retention. This work can pave the way for the development of high‐performance potassium‐based energy storage devices. 相似文献
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