Facile Synthesis of Hierarchical Hollow CoP@C Composites with Superior Performance for Sodium and Potassium Storage

被引:175
作者
Liu, Qiannan [1 ,2 ]
Hu, Zhe [2 ]
Liang, Yaru [3 ,4 ]
Li, Lin [5 ]
Zou, Chao [1 ]
Jin, Huile [1 ]
Wang, Shun [1 ]
Lu, Huanming [3 ]
Gu, Qinfen [6 ]
Chou, Shu-Lei [2 ]
Liu, Yong [7 ]
Dou, Shi-Xue [2 ]
机构
[1] Wenzhou Univ, Coll Chem & Mat Engn, Inst New Mat & Ind Technol, Wenzhou 325027, Zhejiang, Peoples R China
[2] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Squires Way, North Wollongong, NSW 2522, Australia
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[4] Cent South Univ, Powder Met Res Inst, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[5] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn, Coll Chem, Key Lab Adv Energy Mat Chem,Minist Educ, Tianjin 300071, Peoples R China
[6] Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia
[7] Wenzhou Med Univ, Sch Ophthalmol & Optometry, Sch Biomed Engn, 270 Xueyuanxi Rd, Wenzhou 325027, Peoples R China
基金
中国国家自然科学基金;
关键词
CoP@C composites; hierarchical hollow structures; potassium storage; sodium storage; ION BATTERIES; CARBON NANOSHEETS; COBALT PHOSPHIDE; ANODE MATERIALS; PHOSPHORUS; LITHIUM; GRAPHITE; CAPACITY; LIFE;
D O I
10.1002/anie.201913683
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Hierarchical hollow CoP and carbon composites were obtained through a facile synthetic method, where carbonization and phosphorization of the precursor were completed within one single step. The composites are composed of hollow CoP@C spheres, which are further made up of CoP nanoparticles with a thin outer carbon layer. Electrochemical performances of the prepared CoP@C composites as anodes for sodium and potassium storage were evaluated and compared. In situ TEM, in situ synchrotron XRD, and DFT calculations were conducted to study the structural evolution and the interaction between Na/K and CoP during cycling processes. Benefiting from the synergistic effect of conductive carbon layer and hierarchical hollow structure, the as-prepared CoP@C composites demonstrate superior sodium and potassium storage capability as anode materials for rechargeable batteries.
引用
收藏
页码:5159 / 5164
页数:6
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