Improved electrochemical performances of high voltage LiCoO<sub>2</sub> with tungsten doping<xref rid="cpb_27_8_088202_fn1" ref-type="fn">*</xref><fn id="cpb_27_8_088202_fn1"><label>*</label><p>Project supported by the National Key Rerearch and Development Program of China (Grant No. 2017YFB0102004), the National Natural Science Foundation of China (Grant No. 51502334), the Fund from Beijing Municipal Science & Technology Commission, China (Grant No. D171100005517001), and the Thousand Talent Program for Outstanding Young Scientists, China.</p></fn>

Improved electrochemical performances of high voltage LiCoO₂ with tungsten doping**

Project supported by the National Key Rerearch and Development Program of China (Grant No. 2017YFB0102004), the National Natural Science Foundation of China (Grant No. 51502334), the Fund from Beijing Municipal Science & Technology Commission, China (Grant No. D171100005517001), and the Thousand Talent Program for Outstanding Young Scientists, China.

Zhang Jie-Nan^{1, 2}, Li Qing-Hao¹, Li Quan^{1, 2}, Yu Xi-Qian^{1, †}, Li Hong^{1, 2, ‡}

(color online) (a) The depth profile of tungsten abundance at the interface of different LiCoO₂ materials. (b) The schematic diagram of the mechanism of two different surface treatment methods.