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1.
Lin Mei Jiantie Xu Zengxi Wei Huakun Liu Yutao Li Jianmin Ma Shixue Dou 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(34)
With the large‐scale applications of electric vehicles in recent years, future batteries are required to be higher in power and possess higher energy densities, be more environmental friendly, and have longer cycling life, lower cost, and greater safety than current batteries. Therefore, to develop alternative electrode materials for advanced batteries is an important research direction. Recently, the Chevrel phase Mo6T8 (T = S, Se) has attracted increasing attention as electrode candidate for advanced batteries, including monovalent (e.g., lithium and sodium) and multivalent (e.g., magnesium, zinc and aluminum) ion batteries. Benefiting from its unique open crystal structure, the Chevrel phase Mo6T8 cannot only ensure rapid ion transport, but also retain the structure stability during electrochemical reactions. Although the history of the research on Mo6T8 as electrodes for advanced batteries is short, there has been significant progress on the design and fabrication of Mo6T8 for various advanced batteries as above mentioned. An overview of the recent progress on Mo6T8 electrodes applied in advanced batteries is provided, including synthesis methods and diverse structures for Mo6T8, and electrochemical mechanism and performance of Mo6T8. Additionally, a briefly conclusion on the significant progress, obvious drawbacks, emerging challenges and some perspectives on the research of Mo6T8 for advanced batteries in the near future is provided. 相似文献
2.
Ting Jin Qingqing Han Yijing Wang Lifang Jiao 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(2)
Sodium–ion batteries (SIBs) have received extensive attention as ideal candidates for large‐scale energy storage systems (ESSs) owing to the rich resources and low cost of sodium (Na). However, the larger size of Na+ and the less negative redox potential of Na+/Na result in low energy densities, short cycling life, and the sluggish kinetics of SIBs. Therefore, it is necessary to develop appropriate Na storage electrode materials with the capability to host larger Na+ and fast ion diffusion kinetics. 1D materials such as nanofibers, nanotubes, nanorods, and nanowires, are generally considered to be high‐capacity and stable electrode materials, due to their uniform structure, orientated electronic and ionic transport, and strong tolerance to stress change. Here, the synthesis of 1D nanomaterials and their applications in SIBs are reviewed. In addition, the prospects of 1D nanomaterials on energy conversion and storage as well as the development and application orientation of SIBs are presented. 相似文献
3.
Man Huang Baojuan Xi Nianxiang Shi Ruchao Wei Haibo Li Jinkui Feng Shenglin Xiong 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(33)
The fast development of electrochemical energy storage devices necessitates rational design of the high‐performance electrode materials and systematic and deep understanding of the intrinsic energy storage processes. Herein, the preintercalation general strategy of alkali ions (A = Li+, Na+, K+) into titanium dioxide (A‐TO, LTO, NTO, KTO) is proposed to improve the structural stability of anode materials for sodium and lithium storage. The different optimization effects of preintercalated alkali ions on electrochemical properties are studied systematically. Impressively, the three electrode materials manifest totally different capacities and capacity retention. The efficiency of the energy storage process is affected not only by the distinctive structure but also by the suitable interlayer spacing of Ti‐O, as well as by the interaction effect between the host Ti‐O layer and alien cations with proper size, demonstrating the pivotal role of the sodium ions. The greatly enhanced electrochemical performance confirms the importance of rational engineering and synthesis of advanced electrode materials with the preintercalation of proper alkali cations. 相似文献
4.
Min‐Jae Choi Jongsoon Kim Jung‐Keun Yoo Soonmin Yim Jaebeom Jeon Yeon Sik Jung 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(2)
Na/FeSx batteries have remarkable potential applicability due to their high theoretical capacity and cost‐effectiveness. However, realization of high power‐capability and long‐term cyclability remains a major challenge. Herein, ultrafine Fe7S8@C nanocrystals (NCs) as a promising anode material for a Na–ion battery that addresses the above two issues simultaneously is reported. An Fe7S8 core with quantum size (≈10 nm) overcomes the kinetic and thermodynamic constraints of the Na‐S conversion reaction. In addition, the high degree of interconnection through carbon shells improves the electronic transport along the structure. As a result, the Fe7S8@C NCs electrode achieves excellent power capability of 550 mA h g?1 (≈79% retention of its theoretical capacity) at a current rate of 2700 mA g?1. Furthermore, a conformal carbon shell acts as a buffer layer to prevent severe volume change, which provides outstanding cyclability of ≈447 mA h g?1 after 1000 cycles (≈71% retention of the initial charge capacity). 相似文献
5.
Ambient‐ or room‐temperature sodium–sulfur batteries (RT Na–S) are gaining much attention as a low‐cost option for large‐scale electrical energy storage applications. However, their adoption is hampered by severe challenges. This concept paper summarizes first the operating principles, history, recent progress, and challenges of RT Na–S battery technology, and then suggests future directions towards enhancing performance in order for it to be a viable technology. 相似文献
6.
Sodium superoxide (NaO2) based sodium–oxygen batteries (Na‐O2) possess high theoretical energy density and high energy efficiency that can be an alternative energy storage device to lithium‐ion batteries. However, the state‐of‐the‐art sodium–oxygen batteries are still far from real application due to the limited understanding of the cell chemistry and reaction mechanism. This article reviews the recent advances on NaO2‐based Na‐O2 batteries, especially focusing on the reaction mechanism and the stability of NaO2. The parasitic reactions from the highly active NaO2 are discussed. It is hoped this provides insightful understanding on the mechanism and the role of the discharge product in Na‐O2 batteries. 相似文献
7.
8.
Zhen Li Yongjin Fang Jintao Zhang Xiong Wen Lou 《Advanced materials (Deerfield Beach, Fla.)》2018,30(30)
It is of great importance to develop cost‐effective electrode materials for large‐scale use of Na‐ion batteries. Here, a binder‐free electrode based on necklace‐like structures composed of Fe3N@C yolk–shell particles as an advanced anode for Na‐ion batteries is reported. In this electrode, every Fe3N@C unit has a novel yolk–shell structure, which can accommodate the volumetric changes of Fe3N during the (de)sodiation processes for superior structural integrity. Moreover, all reaction units are threaded along the carbon fibers, guaranteeing excellent kinetics for the electrochemical reactions. As a result, when evaluated as an anode material for Na‐ion batteries, the Fe3N@C nano‐necklace electrode delivers a prolonged cycle life over 300 cycles, and achieves a high C‐rate capacity of 248 mAh g?1 at 2 A g?1. 相似文献
9.
Fe2O3 is regarded as a promising anode material for lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs) due to its high specific capacity. The large volume change during discharge and charge processes, however, induces significant cracking of the Fe2O3 anodes, leading to rapid fading of the capacity. Herein, a novel peapod‐like nanostructured material, consisting of Fe2O3 nanoparticles homogeneously encapsulated in the hollow interior of N‐doped porous carbon nanofibers, as a high‐performance anode material is reported. The distinctive structure not only provides enough voids to accommodate the volume expansion of the pea‐like Fe2O3 nanoparticles but also offers a continuous conducting framework for electron transport and accessible nanoporous channels for fast diffusion and transport of Li/Na‐ions. As a consequence, this peapod‐like structure exhibits a stable discharge capacity of 1434 mAh g?1 (at 100 mA g?1) and 806 mAh g?1 (at 200 mA g?1) over 100 cycles as anode materials for LIBs and SIBs, respectively. More importantly, a stable capacity of 958 mAh g?1 after 1000 cycles and 396 mAh g?1 after 1500 cycles can be achieved for LIBs and SIBs, respectively, at a large current density of 2000 mA g?1. This study provides a promising strategy for developing long‐cycle‐life LIBs and SIBs. 相似文献
10.
Bing Sun Peng Li Jinqiang Zhang Dan Wang Paul Munroe Chengyin Wang Peter H. L. Notten Guoxiu Wang 《Advanced materials (Deerfield Beach, Fla.)》2018,30(29)
Sodium (Na) metal is one of the most promising electrode materials for next‐generation low‐cost rechargeable batteries. However, the challenges caused by dendrite growth on Na metal anodes restrict practical applications of rechargeable Na metal batteries. Herein, a nitrogen and sulfur co‐doped carbon nanotube (NSCNT) paper is used as the interlayer to control Na nucleation behavior and suppress the Na dendrite growth. The N‐ and S‐containing functional groups on the carbon nanotubes induce the NSCNTs to be highly “sodiophilic,” which can guide the initial Na nucleation and direct Na to distribute uniformly on the NSCNT paper. As a result, the Na‐metal‐based anode (Na/NSCNT anode) exhibits a dendrite‐free morphology during repeated Na plating and striping and excellent cycling stability. As a proof of concept, it is also demonstrated that the electrochemical performance of sodium–oxygen (Na–O2) batteries using the Na/NSCNT anodes show significantly improved cycling performances compared with Na–O2 batteries with bare Na metal anodes. This work opens a new avenue for the development of next‐generation high‐energy‐density sodium‐metal batteries. 相似文献
11.
Yanzhu Luo Dekang Huang Chennan Liang Pei Wang Kang Han Buke Wu Feifei Cao Liqiang Mai Hao Chen 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(7)
Preventing the aggregation of nanosized electrode materials is a key point to fully utilize the advantage of the high capacity. In this work, a facile and low‐cost surface solvation treatment is developed to synthesize Fe2VO4 hierarchical porous microparticles, which efficiently prevents the aggregation of the Fe2VO4 primary nanoparticles. The reaction between alcohol molecules and surface hydroxy groups is confirmed by density functional theory calculations and Fourier transform infrared spectroscopy. The electrochemical mechanism of Fe2VO4 as lithium‐ion battery anode is characterized by in situ X‐ray diffraction for the first time. This electrode material is capable of delivering a high reversible discharge capacity of 799 mA h g?1 at 0.5 A g?1 with a high initial coulombic efficiency of 79%, and the capacity retention is 78% after 500 cycles. Moreover, a remarkable reversible discharge capacity of 679 mA h g?1 is achieved at 5 A g?1. Furthermore, when tested as sodium‐ion battery anode, a high reversible capacity of 382 mA h g?1 can be delivered at the current density of 1 A g?1, which still retains at 229 mA h g?1 after 1000 cycles. The superior electrochemical performance makes it a potential anode material for high‐rate and long‐life lithium/sodium‐ion batteries. 相似文献
12.
Ming Zhong Donghui Yang Chenchao Xie Zhang Zhang Zhen Zhou Xian‐He Bu 《Small (Weinheim an der Bergstrasse, Germany)》2016,12(40):5564-5571
Manganese oxides (MnOx) are promising anode materials for lithium ion batteries, but they generally exhibit mediocre performances due to intrinsic low ionic conductivity, high polarization, and poor stability. Herein, yolk–shell nanorods comprising of nitrogen‐doped carbon (N–C) coating on manganese monoxide (MnO) coupled with zinc manganate (ZnMn2O4) nanoparticles are manufactured via one‐step carbonization of α‐MnO2/ZIF‐8 precursors. When evaluated as anodes for lithium ion batteries, MnO@ZnMn2O4/N–C exhibits an reversible capacity of 803 mAh g?1 at 50 mA g?1 after 100 cycles, excellent cyclability with a capacity of 595 mAh g?1 at 1000 mAg?1 after 200 cycles, as well as better rate capability compared with those non‐N–C shelled manganese oxides (MnOx). The outstanding electrochemical performance is attributed to the unique yolk–shell nanorod structure, the coating effect of N–C and nanoscale size. 相似文献
13.
Min Du Kun Rui Yuanqin Chang Yu Zhang Zhongyuan Ma Wenping Sun Qingyu Yan Jixin Zhu Wei Huang 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(2)
Metal–organic frameworks (MOFs) and their derivatives with well‐defined structures and compositions show great potential for wide applications such as sensors, catalysis, energy storage, and conversion, etc. However, poor electric conductivity and large volume expansion are main obstacles for their utilization in energy storage, e.g., lithium–ion batteries and supercapacitors. Herein, a facile strategy is proposed for embedding the MOFs, e.g., ZIF‐67 and MIL‐88 into polyacrylonitrile fibers, which is further used as a template to build a 3D interconnected conductive carbon necklace paper. Owing to the unique structure features of good electric conductivity, interconnected frameworks, electroactive reservoir, and dual dopants, the obtained flexible electrodes with no additives exhibit high specific capacities, good rate capability, and prolonged cycling stability. The hollow dodecahedral ZIF‐67 derived carbon necklace paper delivers a high specific capacity of 1200 mAh g?1 and superior stability of more than 400 cycles without capacity decay. Moreover, the spindle‐like MIL‐88 derived carbon necklace paper shows a high reversible capacity of 980 mAh g?1. Their unique 3D interconnected structure and outstanding electrochemical performance pave the way for extending the MOF‐based interweaving materials toward potential applications in portable and wearable electronic devices. 相似文献
14.
Sesi Li Xuebing Zhao Yuzhang Feng Liting Yang Xiaofeng Shi Pingdi Xu Jie Zhang Peng Wang Min Wang Renchao Che 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(27)
Ternary transition metal oxides (TMOs) are highly potential electrode materials for lithium ion batteries (LIBs) due to abundant defects and synergistic effects with various metal elements in a single structure. However, low electronic/ionic conductivity and severe volume change hamper their practical application for lithium storage. Herein, nanosheet‐assembled hollow single‐hole Ni–Co–Mn oxide (NHSNCM) spheres with oxygen vacancies can be obtained through a facile hydrothermal reaction, which makes both ends of each nanosheet exposed to sufficient free space for volume variation, electrolyte for extra active surface area, and dual ion diffusion paths compared with airtight hollow structures. Furthermore, oxygen vacancies could improve ion/electronic transport and ion insertion/extraction process of NHSNCM spheres. Thus, oxygen‐vacancy‐rich NHSNCM spheres embedded into a 3D porous carbon nanotube/graphene network as the anode film ensure efficient electrolyte infiltration into both the exterior and interior of porous and open spheres for a high utilization of the active material, showing an excellent electrochemical performance for LIBs (1595 mAh g?1 over 300 cycles at 2 A g?1, 441.6 mAh g?1 over 4000 cycles at 10 A g?1). Besides, this straightforward synthetic method opens an efficacious avenue for the construction of various nanosheet‐assembled hollow single‐hole TMO spheres for potential applications. 相似文献
15.
Jae Seob Lee Min Su Jo Rakesh Saroha Dae Soo Jung Young Hoe Seon Jun Su Lee Yun Chan Kang Dong‐Won Kang Jung Sang Cho 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(32)
Hierarchically well‐developed porous graphene nanofibers comprising N‐doped graphitic C (NGC)‐coated cobalt oxide hollow nanospheres are introduced as anodes for high‐rate Li‐ion batteries. For this, three strategies, comprising the Kirkendall effect, metal–organic frameworks, and compositing with highly conductive C, are applied to the 1D architecture. In particular, NGC layers are coated on cobalt oxide hollow nanospheres as a primary transport path of electrons followed by graphene‐nanonetwork‐constituting nanofibers as a continuous and secondary electron transport path. Superior cycling performance is achieved, as the unique nanostructure delivers a discharge capacity of 823 mAh g?1 after 500 cycles at 3.0 A g?1 with a low decay rate of 0.092% per cycle. The rate capability is also noteworthy as the structure exhibits high discharge capacities of 1035, 929, 847, 787, 747, 703, 672, 650, 625, 610, 570, 537, 475, 422, 294, and 222 mAh g?1 at current densities of 0.5, 1.5, 3, 5, 7, 10, 12, 15, 18, 20, 25, 30, 40, 50, 80, and 100 A g?1, respectively. In view of the highly efficient Li+ ion/electron diffusion and high structural stability, the present nanostructuring strategy has a huge potential in opening new frontiers for high‐rate and long‐lived stable energy storage systems. 相似文献
16.
Dongbin Xiong Xifei Li Zhimin Bai Shigang Lu 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(17)
Ti3C2Tx, a typical representative among the emerging family of 2D layered transition metal carbides and/or nitrides referred to as MXenes, has exhibited multiple advantages including metallic conductivity, a plastic layer structure, small band gaps, and the hydrophilic nature of its functionalized surface. As a result, this 2D material is intensively investigated for application in the energy storage field. The composition, morphology and texture, surface chemistry, and structural configuration of Ti3C2Tx directly influence its electrochemical performance, e.g., the use of a well‐designed 2D Ti3C2Tx as a rechargeable battery anode has significantly enhanced battery performance by providing more chemically active interfaces, shortened ion‐diffusion lengths, and improved in‐plane carrier/charge‐transport kinetics. Some recent progresses of Ti3C2Tx MXene are achieved in energy storage. This Review summarizes recent advances in the synthesis and electrochemical energy storage applications of Ti3C2Tx MXene including supercapacitors, lithium‐ion batteries, sodium‐ion batteries, and lithium–sulfur batteries. The current opportunities and future challenges of Ti3C2Tx MXene are addressed for energy‐storage devices. This Review seeks to provide a rational and in‐depth understanding of the relation between the electrochemical performance and the nanostructural/chemical composition of Ti3C2Tx, which will promote the further development of 2D MXenes in energy‐storage applications. 相似文献
17.
Kai‐Xue Wang Qian‐Cheng Zhu Jie‐Sheng Chen 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(27)
Rechargeable aprotic lithium (Li)–O2 batteries with high theoretical energy densities are regarded as promising next‐generation energy storage devices and have attracted considerable interest recently. However, these batteries still suffer from many critical issues, such as low capacity, poor cycle life, and low round‐trip efficiency, rendering the practical application of these batteries rather sluggish. Cathode catalysts with high oxygen reduction reaction (ORR) and evolution reaction activities are of particular importance for addressing these issues and consequently promoting the application of Li–O2 batteries. Thus, the rational design and preparation of the catalysts with high ORR activity, good electronic conductivity, and decent chemical/electrochemical stability are still challenging. In this Review, the strategies are outlined including the rational selection of catalytic species, the introduction of a 3D porous structure, the formation of functional composites, and the heteroatom doping which succeeded in the design of high‐performance cathode catalysts for stable Li–O2 batteries. Perspectives on enhancing the overall electrochemical performance of Li–O2 batteries based on the optimization of the properties and reliability of each part of the battery are also made. This Review sheds some new light on the design of highly active cathode catalysts and the development of high‐performance lithium–O2 batteries. 相似文献
18.
Ling Fan Kairui Lin Jue Wang Ruifang Ma Bingan Lu 《Advanced materials (Deerfield Beach, Fla.)》2018,30(20)
A low cost nonaqueous potassium‐based battery–supercapacitor hybrid device (BSH) is successfully established for the first time with soft carbon as the anode, commercialized activated carbon as the cathode, and potassium bis(fluoro‐slufonyl)imide in dimethyl ether as the electrolyte. This BSH reconciles the advantages of potassium ion batteries and supercapacitors, achieving a high energy density of 120 W h kg?1, a high power density of 599 W kg?1, a long cycle life of 1500 cycles, and an ultrafast charge/slow discharge performance (energy density and power density are calculated based on the total mass of active materials in the anode and cathode). This work demonstrates a great potential of applying the nonaqueous BSH for low cost electric energy storage systems. 相似文献
19.