共查询到18条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
5.
6.
用水溶液法以硼酸、氢氟酸和碳酸锂为原料制备出LiBF4水溶液, 经浓缩、结晶、梯度式升温脱水得到锂离子电池电解质盐LiBF4, 应用X射线衍射(XRD)、红外图谱、热分析对其进行了表征. 研究结果表明: 梯度式升温脱水避免了传统的迅速升温导致的部分水合物熔融包裹在晶体表面而妨碍内部晶体脱水, 自制LiBF4与商品LiBF4的XRD图谱吻合, 并与粉末衍射文件(PDF)卡片00-040-1431符合, 确认为无水LiBF4, 属六方晶系, 空间群为P3121; LiBF4红外谱图分析中, 1050 cm-1处的吸收峰分裂为两个分别处于1055和1038 cm-1的吸收峰, 属于T2振动模式的ν3 (as)振动, 在650 cm-1处出现中等强度吸收峰, 属T2振动模式的δ3 (s)振动; LiBF4的TG-DTG图谱中314.31 K处有一微弱分解峰, 在516.48 K处出现强分解峰, 失重率为72.33%, 其分解过程可视为LiBF4分解为LiF和BF3. 相似文献
7.
8.
9.
10.
11.
锂离子电池非水电解质锂盐的研究进展 总被引:4,自引:1,他引:4
新型电解质锂盐主要包括含螯合硼阴离子、螯合磷阴离子、全氟膦阴离子、烷基磺酸阴离子、全氟烷基、亚胺基的有机锂盐及有机铝酸锂盐.本文综述了近年来在新型电解质锂盐研究与探索方面的成果,介绍了锂离子电池电解质锂盐的合成方法、组成与结构、化学和电化学性能及其与结构的关系,并阐述今后电解质锂盐研究的可能发展方向及研究方法. 相似文献
12.
13.
Shuo Huang Jiacai Zhu Prof. Jinlei Tian Prof. Zhiqiang Niu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(64):14480-14494
Rechargeable aqueous zinc-ion batteries (ZIBs) have garnered tremendous attention in the field of next energy storage devices due to their high safety, low cost, abundant resources, and eco-friendliness. As an important component of the zinc-ion battery, the electrolyte plays a vital role in the electrochemical properties, since it will provide a pathway for the migrations of the zinc ions between the cathode and anode, and determine the ionic conductivity, electrochemically stable potential window, and reaction mechanism. In this Minireview, a brief introduction of electrochemical principles of the aqueous ZIBs is discussed and the recent advances of various aqueous electrolytes for ZIBs, including liquid, gel, and multifunctional hydrogel electrolytes are also summarized. Furthermore, the remaining challenges and future directions of electrolytes in aqueous ZIBs are also discussed, which could provide clues for the following development. 相似文献
14.
15.
16.
Dr. Xu Liu Dr. Alessandro Mariani Dr. Henry Adenusi Prof. Dr. Stefano Passerini 《Angewandte Chemie (International ed. in English)》2023,62(17):e202219318
Non-flammable ionic liquid electrolytes (ILEs) are well-known candidates for safer and long-lifespan lithium metal batteries (LMBs). However, the high viscosity and insufficient Li+ transport limit their practical application. Recently, non-solvating and low-viscosity co-solvents diluting ILEs without affecting the local Li+ solvation structure are employed to solve these problems. The diluted electrolytes, i.e., locally concentrated ionic liquid electrolytes (LCILEs), exhibiting lower viscosity, faster Li+ transport, and enhanced compatibility toward lithium metal anodes, are feasible options for the next-generation high-energy-density LMBs. Herein, the progress of the recently developed LCILEs are summarised, including their physicochemical properties, solution structures, and applications in LMBs with a variety of high-energy cathode materials. Lastly, a perspective on the future research directions of LCILEs to further understanding and achieve improved cell performances is outlined. 相似文献
17.
ZnCo2O4 has been attracted wide research attention as a promising anode material for lithium-ion batteries (LIBs) in recent years based on its high theoretical specific capacity, low toxicity as well as stable chemical properties. However, the further large-scale application of pristine ZnCo2O4 anode have been impeded because of its undesirable Li+ ion conductivity, low electronic conductivity, and finite stability of electrolytes at high potentials. Recently, optimizing the micro/nano structure, modification with carbonaceous materials, incorporation with metal oxides and constructing a binder-free structure on conductive substrate for ZnCo2O4-based materials have been verified as promising effective routes for solving the above problems. In this review, the recent advances in underlying reaction mechanisms, synthetic methods and strategies for improving the performance of ZnCo2O4 anodes are comprehensively summarized. The factors affecting the electrochemical properties of ZnCo2O4-based materials are mainly discussed, and paths to promote the specific capacity and cyclic stability are proposed. Finally, several insights into the future developments, challenges, and prospects of ZnCo2O4-based anode materials of LIBs are proposed. 相似文献