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Prof. Yunjian Liu’s Group Published an Article in Nano Energy
Updated:2019-02-26   Hits:   Font size:[Large] [middle] [Small]

Recently, Prof. Yunjian Liu’s group in School of Materials Science & Engineering, published an online paper entitled “A Cation Anion Co-doped Li1.12Na0.08Ni0.2Mn0.6O1.95F0.05 Cathode for Lithium Ion Batteries (Nano Energy 2019, 58, 786-796. DOI: 10.1016/j.nanoen.2019.01.080)” in the journal of Nano Energy (IF = 13.12). Jiangsu University is the signature unit of the first author and the first author is M.S. Dongming Liu (Jiangsu University). Prof. Yunjian Liu (Jiangsu University), Prof. Min Ling (Zhejiang University) and Prof. Chengdu Liang (Zhejiang University) are the co-corresponding authors.

Rechargeable lithium-ion batteries, as one of the most promising energy storage devices, have been developed to power an extensive range of applications, from electric vehicles (EVs) to cell phones as the key component of lithium ion batteries, cathode materials play a key role in determining the energy density and the cost. In recent years, lithium-rich manganese-based layered structure cathode materials are arousing significant attention owing to their extremely high capacity (over 250 mAh·g1) and energy density (over 900 Wh·kg1). In this work, an innovative strategy with Na & F co-doping was proposed to enhance the electrochemical performance of the lithium-rich manganese-based layered oxide Li1.2Ni0.2Mn0.6O2 for the first time. Notably, the structure stability and electrochemical performance of Na & F co-doped sample were significantly improved to an unprecedentedly level, which take both advantages of cations and anions. Consequently, the co-doped sample Li1.12Na0.08Ni0.2Mn0.6O1.95F0.05 shows an excellent cycling stability (100% after 100 cycles at 0.2 C) and a superior rate performance (167 mAh g1 at 5 C). In addition, the proposed co-doping approach applied to enhance the electrochemical performance of Li1.2Ni0.2Mn0.6O2 can also be used to modulate other positive materials for lithium-ion batteries.

 

This work was supported by the funding from National Natural Science Foundation of China (51774150, 51604124, 51604125), National Key R&D Program of China (Grant No. 2018YFB0104300) and Natural Science Foundation of Jiangsu Province (BK20150506, BK20140558, BK20150535).

 

The original link: https://www.sciencedirect.com/science/article/pii/S2211285519300679