Li2ZnCu3 修改了Cu电流采集器来调节沉积
Jiaqi Cao1, Weixin Chen1, Aosong Gao2
1School of Materials, Sun Yat-sen University, Shenzhen, 518107, P.R. China.
Angewandte Chemie (International ed. in English)
|September 14, 2024
概括
一种新型的Li2ZnCu3合金改性铜使先进的金属电池能够稳定,高负载的沉积. 这种电流收集器促进了的均生长,抑制了树突,提高了电池的性能和能量密度.
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:
- 设计稳定的电流收集器对于高能量密度金属电池至关重要.
- 在高负载下实现均沉积仍然是一个重大挑战.
- 现有的收藏器经常患有低孔隙性和形态不稳定性.
研究的目的:
- 开发一种稳定的电流收集器,用于高负载沉积.
- 提高金属电池的性能和安全性.
- 为了实现无树和密集的涂料.
主要方法:
- 在现场将铜与Li2ZnCu3.3合金.
- 制造 Li2ZnCu3@Cu 异质连接.
- 电化学测试Li下载Li2ZnCu3@Cu对称电池和全电池 (与LiFePO4和LiCoO2阴极相比).
主要成果:
- Li2ZnCu3@Cu促进了同质的核和密集增长,达到12 mAh cm-2.
- 修改后的电流采集器抑制了副作用反应,保持了99.2%的平均Coulombic效率,在Li
- 在300个循环后,Li-Li2ZnCu3@Cu धूप炉LiFePO4电池保持了87.5%的容量;Li-Li2ZnCu3@Cu धूप炉LiCoO2电池实现了407.4Wh kg-1的能量密度.
结论:
- 2ZnCu3合金改造为高性能金属电池提供了稳定的电流收集器.
- 设计的异质连接促进了均的沉积,并抑制了树突的形成.
- 这种方法为实现高容量,安全和持久的金属电池提供了可行的策略.
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