Full-cell hydride-based solid-state Li batteries for energy storage
Full-cell hydride-based solid-state Li batteries for energy storage
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DOI：
10.1016/j.ijhydene.2018.12.200
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发表时间：
2019-03-22
影响因子：
7.2
通讯作者：
Yartys, Volodymyr A.
中科院分区：
文献类型：
--
作者：
Latroche, Michel;Blanchard, Didier;Yartys, Volodymyr A.
金属和复合锂离子电池可作为下一代锂电池的阳极和固体电解质。基于与锂形成LiH的转化反应，已经在半电池配置中测试了基于Mg和Ti的阳极材料，其中固体电解质源自复合氢化物LiBH 4的六方高温改性。这些阳极材料显示出大的首次放电容量，证明了它们与锂反应的能力。可逆性仍然更具挑战性，但可能为几十个周期。该工作已扩展到全电池配置，通过耦合金属锂与正极，如硫或二硫化钛通过复杂的氢化物固体电解质。除了仅在120摄氏度以上工作的纯LiBH 4之外，各种策略，如替代，纳米限制和硫化物添加，可以将工作温度降低到50摄氏度左右。此外，已经尝试使用锂闭硼烷。这些结果在固态锂电池领域开辟了新的研究领域。最后，operando和原位中子散射方法应用于全电池作为强大的工具，调查和了解发生在工作电池的反应机制。(C)2019年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
Metallic and complex hydrides may act as anode and solid electrolytes in next generation of lithium batteries. Based on the conversion reaction with lithium to form LiH, Mg- and Ti-based anode materials have been tested in half-cell configuration with solid electrolytes derived from the hexagonal high temperature modification of the complex hydride LiBH4. These anode materials show large first discharge capacities demonstrating their ability to react with lithium. Reversibility remains more challenging though possible for a few dozen cycles. The work has been extended to full-cell configuration by coupling metallic lithium with positive electrodes such as sulfur or titanium disulfide through complex hydride solid electrolytes. Beside pure LiBH4 which works only above 120 degrees C, various strategies like substitution, nanoconfinement and sulfide addition have allowed to lower the working temperature around 50 degrees C. In addition, use of lithium closo-boranes has been attempted. These results break new research ground in the field of solid-state lithium batteries. Finally, operando and in-situ neutron scattering methods applied to full-cells are presented as powerful tools to investigate and understand the reaction mechanisms taking place in working batteries. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.