Surface-targeted functionalization of nickel-rich cathodes through synergistic slurry additive approach with multi-level impact using minimal quantity  

作　　者：Jing Zhang Jiapei Li Longhao Cao Wenhua Cheng Ziyin Guo Xiuxia Zuo Chao Wang Ya-Jun Cheng Yonggao Xia Yudai Huang 

机构地区：[1]State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,College of Chemistry,Xinjiang University,Urumqi 830017,China [2]Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]School of Materials Science and Engineering,Tongji University,Shanghai 200240,China [4]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2024年第1期333-343,共11页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21965034,52061135110,U1903217,52162036,22065033,21905242,and 22075305);the Key Project of Nature Science Foundation of Xinjiang Province(No.2021D01D08);the Xinjiang Autonomous Region Major Projects(Nos.2022A01005-4 and 2021A01001-1);the Natural Science Foundation of Zhejiang Province(No.LD22E020003);the Ningbo Science&Technology Innovation 2025 Major Project(No.2020Z024);the Foundation of State Key Laboratory of Chemistry and Utilization of Carbon-based Energy Resource(No.KFKT2022004);Key Laboratory of Bio-based Polymeric Materials of Zhejiang Province.

摘　　要：LiNi0.8Co0.1Mn0.1O_(2)(NCM811),a Ni-rich layered oxide,is a promising cathode material for high-energy density lithium-ion batteries(LIBs).However,its structural instability,caused by adverse phase transitions and continuous oxygen release,as well as deteriorated interfacial stability due to excessive electrolyte oxidative decomposition,limits its widespread application.To address these issues,a new concept is proposed that surface targeted precise functionalization(STPF)of the NCM811 cathode using a synergistic slurry additive(SSA)approach.This approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane(3-ADMS),followed by the precise deposition of ascorbic acid via an acid-base interaction.The slurry additives induce the formation of an ultra-thin spinel surface layer and a stable cathode–electrolyte interface(CEI),which enhances the electrochemical kinetics and inhibits crack propagation.The STPF strategy implemented by the SSA approach significantly improves the cyclic stability and rate performance of the NCM811 cathode in both half-cell and full-cell configurations.This work establishes a promising strategy to enhance the structural stability and electrochemical performance of nickel-rich cathodes and provides a feasible route to promote practical applications of high-energy density lithium-ion battery technology.

关 键 词：nickel-rich cathode slurry additive lithium-ion battery cathode–electrolyte interface ascorbic acid phase transition 

分 类 号：TM912[电气工程—电力电子与电力传动]