High-voltage lithium-metal battery with three-dimensional mesoporous carbon anode host and ether/carbonate binary electrolyte
High-voltage lithium-metal battery with three-dimensional mesoporous carbon anode host and ether/carbonate binary electrolyte
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DOI：
10.1016/j.carbon.2021.08.087
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发表时间：
2021-09-09
期刊：
影响因子：
10.9
通讯作者：
Chang, Jeng-Kuei
中科院分区：
文献类型：
--
作者：
Adhitama, Egy;Rath, Purna Chandra;Chang, Jeng-Kuei
为锂金属电池开发了电解质配方和锂金属负极主体材料。 1,2-二甲氧基乙烷/碳酸乙烯酯混合溶剂与 1 M 双（氟磺酰基）亚胺锂和 1 wt% LiNO3 被证明可形成坚固的固体电解质界面，并提高锂金属电镀/剥离过程中的库仑效率和循环性能。该电解质可承受高电势，允许 LiNi0.8Co0.1Mn0.1O2 (NMC-811) 阴极运行。一维碳纳米管、二维石墨烯纳米片和三维有序介孔碳CMK-8被用作容纳锂金属的主体材料。具有互穿开放通道的 CMK-8 强大且连续的导电网络被发现是一种有前途的锂金属支架。使用所提出的电解质，CMK-8电极能够在1 mA cm(-2)的实际电流密度下实现均匀的锂沉积/剥离，库仑效率高达99.2%。此外，还实现了 >550 次充放电循环的长寿命。使用电子显微镜和拉曼光谱证实了 CMK-8 在循环时的高结构稳定性。最后，我们使用无锂 CMK-8 电极、NMC-811 阴极和所提出的电解质来构建全电池。评估电化学性能。 (C) 2021 Elsevier Ltd. 保留所有权利。
Electrolyte recipes and Li metal anode host materials are developed for lithium-metal batteries. 1,2-dimethoxyethane/ethylene carbonate mixed solvent with 1 M lithium bis(fluorosulfonyl)imide and 1 wt% LiNO3 is shown to form a robust solid electrolyte interphase and improve Coulombic efficiency and cyclability during Li metal plating/stripping. This electrolyte can withstand high potential, allowing the operation of a LiNi0.8Co0.1Mn0.1O2 (NMC-811) cathode. One-dimensional carbon nanotubes, two-dimensional graphene nanosheets, and three-dimensional ordered mesoporous carbon CMK-8 are used as the host materials for the accommodation of Li metal. The strong and continuous conducting network of CMK-8 with interpenetrating open channels is found to be a promising scaffold for Li metal. With the proposed electrolyte, the CMK-8 electrode enables uniform Li plating/stripping with a high Coulombic efficiency of 99.2% under a practical current density of 1 mA cm(-2). Moreover, a long life of >550 charge-discharge cycles is achieved. The high structural stability of CMK-8 upon cycling is confirmed using electron microscopy and Raman spectroscopy. Finally, we use a Li-free CMK-8 electrode, an NMC-811 cathode, and the proposed electrolyte to construct a full cell. The electrochemical properties are evaluated. (C) 2021 Elsevier Ltd. All rights reserved.