协同三元件全无机固体电解质,用于高度稳定的固态离子电池
Guixiang Xu1, Xin Zhang1, Shuyang Sun1
1State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China.
概括
使用LLZTO,LiBH4和Li3BN2H8的新型复合固体电解质 (CSE) 为固态电池提供了快速的离子导电性和稳定性. 这种低温加工材料使得高性能离子电池成为可能.
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
- 固态化学 固态化学
背景情况:
- 石榴石型Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 具有出色的离子导电性和金属兼容性.
- 然而,LLZTO需要高温烧结,导致成本高,机械性能差,以及界面电阻.
研究的目的:
- 开发一种新的低温加工复合体固体电解质 (CSE),以提高固态电池的性能.
- 为了研究LLZTO-4LiBH4/xLi3BN2H8复合物的电化学特性和稳定性.
主要方法:
- 通过球磨和手工磨来制备一个三组件CSE (LLZTO-4LiBH4/xLi3BN2H8).
- 通过冷压和低温加热 (120°C) 制造绿色颗粒.
- 电化学表征使用Li红对称细胞和Li红CSE红TiS2全细胞.
主要成果:
- 该CSE实现了高室温离子导电性 (1.73 × 10-3 S cm-1在30°C) 和超高的离子转移数 (0.9999).
- 二甲对称细胞在1600小时内表现出稳定的循环,具有最小的超电位 (30mV).
- 立体电池CSE立体TiS2全电池提供了201mAhg-1的容量,具有出色的可循环使用性.
结论:
- 开发的复合体固体电解质为高性能固态电池提供了一个有前途的低温制造路线.
- LLZTO,LiBH4和Li3BN2H8的协同作用有助于低孔度,高离子导电性和良好的可变性.
- 这种CSE克服了传统高温烧结电解质的局限性,为具有成本效益和高效的能源存储铺平了道路.
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