高效对齐的离子导电网络和接口化学,用于去极化全固态金属电池
Yongbiao Mu1,2,3, Shixiang Yu2,4, Yuzhu Chen2
1Shenzhen Key Laboratory of Advanced Energy Storage, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China.
Nano-micro letters
|January 12, 2024
概括
本研究介绍了全固态金属电池的3D打印复合材料固体电解质,通过改善接口接触和离子传输来提高稳定性和能量密度,从而延长电池寿命.
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:
- 由于接口问题,全固态金属电池 (ASSLMB) 在长期循环稳定性和能量密度方面面临挑战.
- 当前的二维固体电解质具有有限的接口接触,导致不稳定的接口和缓慢的离子传输.
研究的目的:
- 为ASSLMBs开发3D建筑设计的复合固体电解质.
- 改善固体-固体接口接触并加速离子传输以提高电池性能.
主要方法:
- 利用3D打印和后固化制造复合体固体电解质,控制结构因素.
- 为电解质薄膜设计的垂直对齐的微柱 (p-3DSE) 和螺旋 (s-3DSE) 结构.
- 在金属阳极和阴极应用中评估电解质性能.
主要成果:
- 打印的p-3DSE表现出极好的长期循环稳定性 (高达2600个循环) 和高临界电流密度 (1.92 mA cm−2).
- 实现了2.75 mAh cm−2 (LFP) 和3.92 mAh cm−2 (NCM811) 的卓越的全细胞面积容量.
- 三维结构有效地缓解了因状物生长和接触损失引起的界面退化.
结论:
- 开发的3D复合体固体电解质为先进的ASSLMB提供了一种新的设计策略.
- 这种方法提高了阳极和阴极的性能,用于高速率/容量室温操作.
- 这项研究为更稳定,更高能量密度的固态电池铺平了道路.
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