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Revisiting Electrolyte Kinetics Differences in Sodium Ion Battery:Are Esters Really Inferior to Ethers?

Energy & Environmental Materials 2023年第4期6卷 203-210页

作者： Lei Yan Guifang Zhang Jing Wang Qingjuan Ren Linlin Fan Binhua Liu Yujia Wang Wenhua Lei Dianbo Ruan Qingyin Zhang Zhiqiang Shi Tianjin Key Laboratory of Advanced Fibers and Energy Storage School of Materials Science and EngineeringTiangong UniversityTianjin 300387China Institute of Advanced Energy Storage Technology and Equipment Ningbo UniversityNingbo Zhejiang 315211China School of Chemical Engineering and Technology Tiangong UniversityTianjin 300387China

The ether electrolytes usually outperform ester electrolytes by evaluating sodium-ion batteries(SIBs)rate performance,which is a near-unanimous conclusion of previous studies based on an essential configuration of the half-cell ***,here we find that contrary to consensus,the ester electrolyte shows better Na storage capability than the ether electrolyte in full *** in-depth analysis of three-electrode,symmetric cell,and in situ XRD tests indicates that traditional half-cell test results are unreliable due to interference from Na *** particular,Na electrodes show a huge stability difference in ester and ether electrolytes,and ester electrolytes suffer more severe interference than ether electrolytes,resulting in the belief that esters are far inferior to ether *** seriously,the more accurate three-electrode test would also suffer from Na electrode ***,a“corrected half-cell test”protocol is developed to shield the Na electrode interference,revealing the very close super rate capability of hard carbon in ester and ether *** work breaks the inherent perception that the kinetic properties of ester electrolytes are inferior to ethers in sodium-ion batteries,reveals the pitfalls of half-cell tests,and proposes a new test protocol for reliable results,greatly accelerating the commercialization of sodium-ion batteries.

关键词： corrected half-cell test electrolyte kinetic data hard carbon Na electrode interference sodium-ion batteries

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