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在高电压金属电池中以阴离子缺陷调节的离子迁移

Yingmeng Zhang^1,2, Jianhua Zhang¹, Zaohui Ding¹

¹Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.

|December 7, 2023

概括

有TiNbO4粒的3D碳纳米纤维 (CNF) 上的负电荷位使金属电池 (LMB) 能够均地金属. 这种方法显著提高了下一代高能电池的循环稳定性和库伦比克效率.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

金属阳极为先进的电池提供高能量密度,但由于不均的Li + 离子传输,因此遭受了树突增长和短周期寿命.
在原子层面控制+离子沉积对于稳定金属电池 (LMB) 中的金属阳极至关重要.

研究的目的:

调查负电荷的性位作为调节LMB中Li+离子沉积的宿主.
为了证明3D碳纳米纤维与负电荷TiNbO4颗粒 (CNF/nc-TNO) 装饰的有效性,作为金属阳极的稳定宿主.

主要方法:

通过碳热还原制造3D碳纳米纤维 (CNFs),用负电荷的TiNbO4颗粒 (nc-TNO) 装饰.
对负电荷表面和引导Li+离子流动的静电相互作用的描述.
使用CNF/nc-TNO宿主组装和测试不对称和全金属电池电池,比较与中性CNF和Cu薄膜的性能.

主要成果:

在CNF/nc-TNO主机中,即使在高电流密度 (10mA cm-2) 中,也表现出均的环形金属.
与对照组相比,使用CNF/nc-TNO的不对称细胞表现出优越且稳定的库伦比克效率 (99.2%在380个周期内).
在长时间的涂/脱落 (4000+小时) 期间,CNF/nc-TNO在低压歇斯底里表现出高稳定性,在NCM811阴极的全电池中表现稳定.

结论:

负电荷的性位,特别是CNF上的TiNbO4中的阴离子空位,有效调节Li+离子沉积,抑制树突形成.
CNF/nc-TNO主机为下一代电池中的稳定和高性能金属阳极提供了一个强大的平台.
这一战略为开发高能量密度和长寿命的金属电池提供了一个有前途的途径.

关键词:

三维金属主机金属电池金属电池关于职位空缺的情况诱导沉积的诱导沉积是一种诱导沉积.负面表面电荷是一个负面表面电荷.

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