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双缺陷工程战略使可充电的高耐久性金属电池成为可能

Fuyu Chen^1,2, Bai-Qing Zhao³, Kaifeng Huang^1,2

¹National Innovation Center for Lndustry-Education Integration of Energy Storage Technology, School of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People's Republic of China.

Nano-micro letters

|April 29, 2024

概括

双缺陷工程增强可充电金属电池阴极. 这一战略提高了容量和循环寿命,为实际的金属电池铺平了道路.

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:

可充电金属电池 (RMMB) 是有前途的,但受到低阴极容量和周期寿命差的限制.
现有的策略提高了Mg2+的动力学和稳定性,但忽视了电子导电性,阻碍了与金属阳极的兼容性.
开发高性能阴极对于推进RMB技术至关重要.

研究的目的:

引入双缺陷工程策略,以提高RMB阴极性能.
同时提高Mg2+迁移动力学,结构稳定性和电子导电性.
为了证明这种策略的有效性,使用基于V2O5·nH2O的阴极.

主要方法:

将Mg2+预间接缺陷 (P-Mgd) 和氧缺陷 (Od) 纳入片状V2O5·nH2O.中.
制备一个复合阴极 (MVOH/rGO) 具有双缺陷和减少氧化石墨烯.
制造和测试Mg薄膜//MVOH/rGO全细胞.

主要成果:

双缺陷工程策略成功改善了Mg2+迁移,结构稳定性和电子导电性.
该MVOH/rGO阴极实现了197mAhg-1的高容量.
整个电池的周期寿命为0.1A g-1的850个周期,并为LED供电.

结论:

双缺陷工程 (P-Mgd和Od) 是开发高性能RMMB阴极的有效策略.
这种方法克服了容量,循环寿命和电子导电性的限制.
这些发现推动了RMMB和其他二次电池技术的实际应用.

关键词:

双缺陷工程双缺陷工程高耐久性高耐久性状结构状结构状结构可充电的金属电池可以充电.基于的阴极是基于的.

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