Degradation Mechanism of O3-Type NaNi_{1/3}Fe_{1/3}Mn_{1/3}O₂ Cathode Materials During Ambient Storage and Their In Situ Regeneration

Yang Sun; Hong Wang; Dechao Meng; Xiaoqiao Li; Xiaozhen Liao; Haiying Che; Guijia Cui; Fengping Yu; Weimin Yang; Linsen Li; Zi-Feng Ma

doi:10.1021/acsaem.1c00047

journal article·2021-03-22

Degradation Mechanism of O3-Type NaNi_1/3Fe_1/3Mn_1/3O₂ Cathode Materials During Ambient Storage and Their In Situ Regeneration

Yang Sun, Hong Wang, Dechao Meng, Xiaoqiao Li, Xiaozhen Liao, Haiying Che, Guijia Cui, Fengping Yu, Weimin Yang, Linsen Li, Zi-Feng Ma

ACS Applied Energy Materials· Volume 4· Issue 3

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Abstract

Sodium-ion batteries (SIBs) hold great promise for low-cost energy storage. Despite the major advances made in the material preparation and battery performance, air instability has become a bottleneck for the storage and electrode fabrication of O3-type NaNi1/3Fe1/3Mn1/3O2 (NFM), but the underlying mechanism remains elusive. Here we discovered that NFM loses Na+ ions during ambient storage and Na2CO3 “fibers” sprout from the particle surface, which caused the performance decay. We further demonstrated a facile resintering strategy to regenerate the NFM in situ. This work highlights the importance of stringent humidity control and provides the basis for designing surface-modification strategies.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, China

Zhejiang NaTRIUM Energy Co. Ltd., Shaoxing 312000, China

Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China

Funding

Ministry of Science and Technology of the People's Republic of China · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Zhejiang Key research and development program

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