Cotton-derived oxygen/sulfur co-doped hard carbon as advanced anode material for potassium-ion batteries
a School of Physics and Electronics, Hunan University, Changsha 410082, China
b Yiyang Wanjingyuan Electronics Co., Ltd., Yiyang 413000, China
c College of Traffic Engineering, Hunan University of Technology, Zhuzhou 412008, China
d Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
e State Key Lab of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072 China
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