Surface-modified and sulfide electrolyte-infiltrated LiNi0.6Co0.2Mn0.2O2 cathode for all-solid-state lithium batteries

Genjie Huang; Yu Zhong; Xinhui Xia; Xiuli Wang; Changdong Gu; Jiangping Tu

doi:10.1016/j.jcis.2022.11.048

Surface-modified and sulfide electrolyte-infiltrated LiNi_0.6Co_0.2Mn_0.2O₂ cathode for all-solid-state lithium batteries

J Colloid Interface Sci. 2023 Feb 15;632(Pt A):11-18. doi: 10.1016/j.jcis.2022.11.048. Epub 2022 Nov 14.

Authors

Genjie Huang¹, Yu Zhong², Xinhui Xia¹, Xiuli Wang¹, Changdong Gu¹, Jiangping Tu³

Affiliations

¹ State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China.
² State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: yu_zhong@zju.edu.cn.
³ State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: tujp@zju.edu.cn.

PMID: 36403373
DOI: 10.1016/j.jcis.2022.11.048

Abstract

Sulfide-based all-solid-state lithium batteries (ASSLBs) with high-voltage Ni-rich layered cathodes have shown great potential in energy storage systems. However, the application of ASSLBs is hindered by severe interface issues and poor solid-solid contact between cathodes and sulfide electrolytes. In this work, a suitably thin Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) coating (0.41 mS cm^-1) is introduced onto the surface of single-crystal LiNi_0.6Co_0.2Mn_0.2O₂ particles to mitigate interface side reactions. Subsequently, sheet-type electrodes are fabricated by the infiltration of Li₁₀GeP₂S₁₂ to fill the voids and achieve highly dense solid-solid contact, thus preventing contact loss. The Li₁₀GeP₂S₁₂-infiltrated ASSLBs with a LAGP buffer layer display a high initial discharge capacity of 141.5 mAh g^-1 at 0.05 C and ultrastable cycling for 100 cycles at 0.1 C. An effective fabrication method for highly dense electrodes is proposed in this work, which provides a new direction for scalable industrial production.

Keywords: All-solid-state lithium battery; Interface modification; Ni-rich layer oxide; Sulfide electrolyte.