共查询到20条相似文献，搜索用时 15 毫秒
1.
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
2.
Muqing Ren Jibo Zhang Mengmeng Fan Pulickel M. Ajayan James M. Tour 《Advanced Materials Interfaces》2019,6(19)
The development of efficient bifunctional catalysts for oxygen reduction and evolution reactions (ORR and OER) is important in the development of rechargeable metal–O2 (air) batteries. Here, a straightforward synthesis of highly efficient bifunctional OER/ORR catalysts MnNiFe/LIG (M111/LIG and M311/LIG where the numbers reflect the relative molar ratio of Mn, Ni, and Fe species) is presented through a facile re‐lasing method. The MnNiFe/LIG shows promising performance in Li–O2 and Li–air batteries without the presence of a redox mediator. The Li–O2 battery with M311/LIG catalysts is reliably discharged and charged for 150 cycles while the discharge potential slightly increases by 0.24 V. The Li‐breathing air battery with M311/LIG catalyst is stable during 350 cycles while the Li‐breathing air battery with M111/LIG catalyst is stable for ≈300 cycles. The function of the M111/LIG and M311/LIG catalysts in the Li–O2 batteries and the influence of the catalysts on the discharge and decomposition products are also investigated. This study promotes further development in carbon–metal oxide composite cathode catalysts for metal–air batteries and underscores the efficacy of laser‐induced graphene for electrode fabrications. 相似文献
3.
Bendable energy‐storage systems with high energy density are demanded for conformal electronics. Lithium‐metal batteries including lithium–sulfur and lithium–oxygen cells have much higher theoretical energy density than lithium‐ion batteries. Reckoned as the ideal anode, however, Li has many challenges when directly used, especially its tendency to form dendrite. Under bending conditions, the Li‐dendrite growth can be further aggravated due to bending‐induced local plastic deformation and Li‐filaments pulverization. Here, the Li‐metal anodes are made bending tolerant by integrating Li into bendable scaffolds such as reduced graphene oxide (r‐GO) films. In the composites, the bending stress is largely dissipated by the scaffolds. The scaffolds have increased available surface for homogeneous Li plating and minimize volume fluctuation of Li electrodes during cycling. Significantly improved cycling performance under bending conditions is achieved. With the bending‐tolerant r‐GO/Li‐metal anode, bendable lithium–sulfur and lithium–oxygen batteries with long cycling stability are realized. A bendable integrated solar cell–battery system charged by light with stable output and a series connected bendable battery pack with higher voltage is also demonstrated. It is anticipated that this bending‐tolerant anode can be combined with further electrolytes and cathodes to develop new bendable energy systems. 相似文献
4.
5.
Alvin Dai Qidong Li Tongchao Liu Khalil Amine Jun Lu 《Advanced materials (Deerfield Beach, Fla.)》2019,31(31)
Modern sustainability challenges in recent years have warranted the development of new energy storage technologies. Practical realization of the lithium–O2 battery holds great promise for revolutionizing energy storage as it holds the highest theoretical specific energy of any rechargeable battery yet discovered. However, the complete realization of Li–O2 batteries necessitates ambient air operations, which presents quite a few challenges, as carbon dioxide (CO2) and water (H2O) contaminants introduce unwanted byproducts from side reactions that greatly affect battery performance. Although current research has thoroughly explored the beneficial incorporation of CO2, much mystery remains over the inconsistent effects of H2O. The presence of water in both the cathode and electrolyte has been observed to alter reaction mechanisms differently, resulting in a diverse range of effects on voltage, capacity, and cyclability. Moreover, recent preliminary research with catalysts and redox mediators has attempted to utilize the presence of water to the battery's benefit. Here, the key mechanism discrepancies of water‐afflicted Li–O2 batteries are presented, concluding with a perspective on future research directions for nonaqueous Li–O2 batteries. 相似文献
6.
Yan‐Bin Yin Ji‐Jing Xu Qing‐Chao Liu Xin‐Bo Zhang 《Advanced materials (Deerfield Beach, Fla.)》2016,28(34):7494-7500
7.
8.
Wen‐Bin Luo Xuan‐Wen Gao Shu‐Lei Chou Jia‐Zhao Wang Hua‐Kun Liu 《Advanced materials (Deerfield Beach, Fla.)》2015,27(43):6862-6869
9.
Haoyang Xu Ruixin Zheng Dayue Du Longfei Ren Xiaojuan Wen Xinxiang Wang Guilei Tian Chaozhu Shu 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(9):2206611
Rationally designing efficient catalysts is the key to promote the kinetics of oxygen electrode reactions in lithium-oxygen (Li-O2) battery. Herein, nitrogen-doped Ti3C2 MXene prepared via hydrothermal method (N-Ti3C2(H)) is studied as the efficient Li-O2 battery catalyst. The nitrogen doping increases the disorder degree of N-Ti3C2(H) and provides abundant active sites, which is conducive to the uniform formation and decomposition of discharge product Li2O2. Besides, density functional theory calculations confirm that the introduction of nitrogen can effectively modulate the 3d orbital occupation of Ti in N-Ti3C2(H), promote the electron exchange between Ti 3d orbital and O 2p orbital, and accelerate oxygen electrode reactions. Specifically, the N-Ti3C2(H) based Li-O2 battery delivers large discharge capacity (11 679.8 mAh g−1) and extended stability (372 cycles). This work provides a valuable strategy for regulating 3d orbital occupancy of transition metal in MXene to improve the catalytic activity of oxygen electrode reactions in Li-O2 battery. 相似文献
10.
11.
Yantao Zhang Liang Wang Xiaozheng Zhang Limin Guo Ying Wang Zhangquan Peng 《Advanced materials (Deerfield Beach, Fla.)》2018,30(5)
Discharging of the aprotic Li–O2 battery relies on O2 reduction to insulating solid Li2O2, which can either deposit as thin films on the cathode surface or precipitate as large particles in the electrolyte solution. Toward realizing Li–O2 batteries with high capacity and high rate capability, it is crucially important to discharge Li2O2 in the electrolyte solution rather than on the cathode surface. Here, a soluble electrocatalyst of coenzyme Q10 (CoQ10) that can efficaciously drive solution phase formation of Li2O2 in current benchmark ether‐based Li–O2 batteries is reported, which would otherwise lead to Li2O2 surface‐film growth and premature cell death. In the range of current densities of 0.1–0.5 mA cm?2areal, the CoQ10‐catalyzed Li–O2 battery can deliver a discharge capacity that is ≈40–100 times what the pristine Li–O2 battery could achieve. The drastically enhanced electrochemical performance is attributed to the CoQ10 that not only efficiently mediates the electron transfer from the cathode to dissolve O2 but also strongly interacts with the newly formed Li2O2 in solution retarding its precipitation on the cathode surface. The mediated oxygen reduction reaction and the bonding mechanism between CoQ10 and Li2O2 are understood with density functional theory calculations. 相似文献
12.
Wenyu Zhang Libo Sun Jean Marie Vianney Nsanzimana Xin Wang 《Advanced materials (Deerfield Beach, Fla.)》2018,30(15)
Silicene has recently received increasing interest due to its unique properties. However, the synthesis of silicene remains challenging, which limits its wide applications. In this work, a top‐down lithiation and delithiation process is developed to prepare few layer silicene‐like nanosheets from ball‐milled silicon nanopowders. It is found that delithiation solvent plays a critical role in the structure evolution of the final products. The use of isopropyl alcohol renders 2D silicene‐like products 30–100 nm in length and ≈2.4 nm in thickness. The electrochemical characterization analysis suggests that the product shows high performance for rechargeable Li–O2 batteries with 73% energy efficiency and high stability. The top‐down synthesis strategy proposed in this work not only provides a new solution to the challenging preparation issue of few layer silicene but also demonstrates the feasibility of producing 2D materials from nonlayered starting structures. 相似文献
13.
Wei Jin Jianping Chen Bing Liu Jiugang Hu Zexing Wu Weiquan Cai Gengtao Fu 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(46)
An efficient and low‐cost electrocatalyst for reversible oxygen electrocatalysis is crucial for improving the performance of rechargeable metal?air batteries. Herein, a novel oxygen vacancy–rich 2D porous In‐doped CoO/CoP heterostructure (In‐CoO/CoP FNS) is designed and developed by a facile free radicals–induced strategy as an effective bifunctional electrocatalyst for rechargeable Zn–air batteries. The electron spin resonance and X‐ray absorption near edge spectroscopy provide clear evidence that abundant oxygen vacancies are formed in the interface of In‐CoO/CoP FNS. Owing to abundant oxygen vacancies, porous heterostructure, and multiple components, In‐CoO/CoP FNS exhibits excellent oxygen reduction reaction activity with a positive half‐wave potential of 0.81 V and superior oxygen evolution reaction activity with a low overpotential of 365 mV at 10 mA cm?2. Moreover, a home‐made Zn–air battery with In‐CoO/CoP FNS as an air cathode delivers a large power density of 139.4 mW cm?2, a high energy density of 938 Wh kgZn?1, and can be steadily cycled over 130 h at 10 mA cm?2, demonstrating great application potential in rechargeable metal–air batteries. 相似文献
14.
Xiaoyan Jin Mihui Park Seung‐Jae Shin Yujin Jo Min Gyu Kim Hyungjun Kim Yong‐Mook Kang Seong‐Ju Hwang 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(12)
An efficient way to improve the electrocatalyst and Li–O2 battery performances of metal oxide is developed by an exquisite synergistic control over structural disorder and surface bonding nature. The effects of amorphous nature and surface chemical environment on the functionalities of metal oxide are systematically investigated with well‐crystalline and amorphous MnO2 nanocrystals with/without surface anchoring of highly oxidized iodate clusters. The amorphous MnO2 nanocrystal containing anchored iodate clusters shows much better performance as an oxygen evolution electrocatalyst and cathode catalyst for Li–O2 batteries than both iodate‐free amorphous and well‐crystalline homologues, underscoring the remarkable advantage of simultaneous enhancement of structural disorder and surface electron density. In situ X‐ray absorption spectroscopic analysis demonstrates the promoted formation of double (Mn?O) bond, a critical step of oxygen evolution reaction, upon amorphization caused by the poor orbital overlap inside highly disordered crystallites. The beneficial effects of iodate anchoring and amorphization on electrocatalyst functionality are attributable to the alteration of surface bonding character, stabilization of Jahn–Teller active Mn3+ species, and enhanced charge transfer of interfaces. The present study underscores that fine‐tuning of structural disorder and surface bonding nature provides an effective methodology to explore efficient metal oxide‐based electrocatalysts. 相似文献
15.
16.
17.
Yijie Wang Qinghe Cao Cao Guan Chuanwei Cheng 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(33)
Flexible solid‐state Zn–air batteries have been rapidly developed benefiting from the uprising demand for wearable electronic devices, wherein the air electrode integrated with efficient bifunctional oxygen electrocatalysts plays an important role to achieve high performance. Binder‐free self‐supported bifunctional catalysts can provide large active surface area, fast electron transport path, easy ion diffusion, and excellent structural stability and flexibility, thus acting as promising flexible air cathodes. In this review, recent advances on the application of nanoarrayed electrocatalysts as air cathodes in flexible Zn–air batteries are reviewed. Especially, various types of bifunctional oxygen electrocatalysts, including carbonaceous material arrays, transition metal compound arrays, transition metal/carbon arrays, transition metal compound/carbon arrays, and other hybrid arrays, are discussed. The applications of flexible Zn–air batteries with two configurations (i.e., planar stacks and cable fibers) are also introduced. Finally, perspectives on the optimization of arrayed air cathodes for future development to achieve high‐performance flexible Zn–air batteries are shared. 相似文献
18.
Fan‐Lu Meng Kai‐Hua Liu Yan Zhang Miao‐Miao Shi Xin‐Bo Zhang Jun‐Min Yan Qing Jiang 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(32)
Large‐scale application of renewable energy and rapid development of electric vehicles have brought unprecedented demand for advanced energy‐storage/conversion technologies and equipment. Rechargeable zinc (Zn)–air batteries represent one of the most promising candidates because of their high energy density, safety, environmental friendliness, and low cost. The air electrode plays a key role in managing the many complex physical and chemical processes occurring on it to achieve high performance of Zn–air batteries. Herein, recent advances of air electrodes from bifunctional catalysts to architectures are summarized, and their advantages and disadvantages are discussed to underline the importance of progress in the evolution of bifunctional air electrodes. Finally, some challenges and the direction of future research are provided for the optimized design of bifunctional air electrodes to achieve high performance of rechargeable Zn–air batteries. 相似文献
19.
Lingwen Zhao Juanjuan Feng Adeel Abbas Chunlei Wang Hongchao Wang 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(41):2302953
Designing efficient and cost-effective electrocatalysts is the primary imperative for addressing the pivotal concerns confronting lithium–oxygen batteries (LOBs). The microstructure of the catalyst is one of the key factors that influence the catalytic performance. This study proceeds to the advantage of metal-organic frameworks (MOFs) derivatives by annealing manganese 1,2,3-triazolate (MET-2) at different temperatures to optimize Mn2O3 crystals for special microstructures. It is found that at 350 °C annealing temperature, the derived Mn2O3 nanocage maintains the structure of MOF, the inherited high porosity and large specific surface area provide more channels for Li+ and O2 diffusion, beside the oxygen vacancies on the surface of Mn2O3 nanocages enhance the electrocatalytic activity. With the synergy of unique structure and rich oxygen vacancies, the Mn2O3 nanocage exhibits ultrahigh discharge capacity (21 070.6 mAh g−1 at 500 mA g−1) and excellent cycling stability (180 cycles at the limited capacity of 600 mAh g−1 with a current of 500 mA g−1). This study demonstrates that the Mn2O3 nanocage structure containing oxygen vacancies can significantly enhance catalytic performance for LOBs, which provide a simple method for structurally designed transition metal oxide electrocatalysts. 相似文献
20.
Kaiming Liao Shichao Wu Xiaowei Mu Qian Lu Min Han Ping He Zongping Shao Haoshen Zhou 《Advanced materials (Deerfield Beach, Fla.)》2018,30(36)
Lithium metal is an ultimate anode in “next‐generation” rechargeable batteries, such as Li–sulfur batteries and Li–air (Li–O2) batteries. However, uncontrollable dendritic Li growth and water attack have prevented its practical applications, especially for open‐system Li–O2 batteries. Here, it is reported that the issues can be addressed via the facile process of immersing the Li metal in organic GeCl4–THF steam for several minutes before battery assembly. This creates a 1.5 µm thick protection layer composed of Ge, GeOx, Li2CO3, LiOH, LiCl, and Li2O on Li surface that allows stable cycling of Li electrodes both in Li‐symmetrical cells and Li–O2 cells, especially in “moist” electrolytes (with 1000–10 000 ppm H2O) and humid O2 atmosphere (relative humidity (RH) of 45%). This work illustrates a simple and effective way for the unfettered development of Li‐metal‐based batteries. 相似文献