Breaking boundaries in O_(3)-type NaNi_(1/3)Fe_(1/3)Mn_(1/3)O_(2)cathode materials for sodium-ion batteries:An industrially scalable reheating strategy for superior electrochemical performance  

作　　者：Manman Chen Cai Zhao Yan Li Hui Wang Kaihang Wang Shengchen Yang Yue Gao Wenjuan Zhang Chun Chen Tao Zhang Lei Wen Kehua Dai Jing Mao 

机构地区：[1]School of Materials Science and Engineering,Zhengzhou University,State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials,Zhengzhou 450001,Henan,China [2]College of Chemistry,Tianjin Normal University,Tianjin 300387,China [3]Longzihu New Energy Laboratory,Zhengzhou 450000,Henan,China [4]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China

出　　处：《Journal of Energy Chemistry》2025年第3期107-119,共13页能源化学(英文版)

基　　金：the financial support provided by the Longzihu New Energy Laboratory Joint Fund of Henan Province(2023008);the Energy Storage Mater.and Processes Key Laboratory of Henan Province Open Fund(2021003);the Collaborative Innovation Team Project Fund of Industry-University-Research(32214085);the financial support received from Zhejiang Vast Na Technology Co.,Ltd.(24110380)。

摘　　要：To address the challenges of air stability and slurry processability in layered transition metal oxide O_(3)-type NaNi_(1/3)Fe_(1/3)Mn_(1/3)O_(2)(NFM)for sodium-ion batteries(SIBs),we have designed an innovative 500℃reheating strategy.This method improves the surface properties of NFM without the need for additional coating layers,making it more efficient and suitable for large-scale applications.Pristine NFM(NFM-P)was first synthesized through a high-temperature solid-state method and then modified using this reheating approach(NFM-HT).This strategy significantly enhances air stability and electrochemical performance,yielding an initial discharge specific capacity of 151.46 mAh/g at 0.1C,with a remarkable capacity retention of 95.04%after 100 cycles at 0.5C.Additionally,a 1.7 Ah NFM‖HC(hard carbon)pouch cell demonstrates excellent long-term cycling stability(94.64%retention after 500 cycles at 1C),superior rate capability(86.48%retention at 9C),and strong low-temperature performance(77%retention at-25℃,continuing power supply at-40℃).Notably,even when overcharged to 8.29 V,the pouch cell remained safe without combustion or explosion.This reheating strategy,which eliminates the need for a coating layer,offers a simpler,more scalable solution for industrial production while maintaining outstanding electrochemical performance.These results pave the way for broader commercial adoption of NFM materials.

关 键 词：Sodium-ion batteries O_(3)-type layered oxide cathode REHEATING Al_(2)O_(3)coating Pouch full cells 

分 类 号：TM912[电气工程—电力电子与电力传动]