Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/139005
Title: Lowering charge transfer barrier of LiMn2O4 via nickel surface doping to enhance Li+ intercalation kinetics at subzero temperatures
Authors: Zhang, Wei
Sun, Xiaoli
Tang, Yuxin
Xia, Huarong
Zeng, Yi
Qiao, Liang
Zhu, Zhiqiang
Lv, Zhisheng
Zhang, Yanyan
Ge, Xiang
Xi, Shibo
Wang, Zhiguo
Du, Yonghua
Chen, Xiaodong
Keywords: Engineering::Materials::Energy materials
Issue Date: 2019
Source: Zhang, W., Sun, X., Tang, Y., Xia, H., Zeng, Y., Qiao, L., . . . Chen, X. (2019). Lowering charge transfer barrier of LiMn2O4 via nickel surface doping to enhance Li+ intercalation kinetics at subzero temperatures. Journal of the American Chemical Society, 141(36), 14038-14042. doi:10.1021/jacs.9b05531
Journal: Journal of the American Chemical Society
Abstract: Sluggish interfacial kinetics leading to considerable loss of energy and power capabilities at subzero temperatures is still a big challenge to overcome for Li-ion batteries operating under extreme environmental conditions. Herein, using LiMn2O4 as the model system, we demonstrated that nickel surface doping to construct a new interface owning lower charge transfer energy barrier, could effectively facilitate the interfacial process and inhibit the capacity loss with decreased temperature. Detailed investigations on the charge transfer process via electrochemical impedance spectroscopy and density functional theory calculation, indicate that the interfacial chemistry tuning could effectively lower the activation energy of charge transfer process by nearly 20%, endowing the cells with ∼75.4% capacity at −30 °C, far surpassing the hardly discharged unmodified counterpart. This control of surface chemistry to tune interfacial dynamics proposes insights and design ideas for batteries to well survive under thermal extremes.
URI: https://hdl.handle.net/10356/139005
ISSN: 0002-7863
DOI: 10.1021/jacs.9b05531
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of the American Chemical Society, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/jacs.9b05531
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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