A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries
文献类型：期刊论文
| 作者 | Lu, Jian1; Wang, Changlai1,2; Xia, Guoliang1; Tong, Huigang1; Yang, Yang1; Zhu, Dequan4; Chen, Qianwang1,3
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| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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| 出版日期 | 2020-12-07 |
| 卷号 | 8 |
| ISSN号 | 2050-7488 |
| DOI | 10.1039/d0ta08845e |
| 通讯作者 | Chen, Qianwang(cqw@ustc.edu.cn) |
| 英文摘要 | Metal oxides usually exhibit low reversible capacity, inferior rate capability and limited lifespan for potassium-ion batteries due to the large radius of K+. Herein, a spring-like lamellar nanostructure composed of VO nanoparticles embedded in amorphous carbon layers (VO/C) has been rationally designed. It exhibits a large capacity of 345 mA h g(-1) at 0.1 A g(-1) after 400 cycles, excellent stability of 241 mA h g(-1) at 1 A g(-1) over 1000 cycles and outstanding rate performance of 104 mA h g(-1) at 15 A g(-1), superior to most reported transition metal oxides for PIBs. The in situ formed lamellar VO/C nanostructure can accommodate the volume variation during cycling. Density functional theory (DFT) calculations reveal that the hybrid VO/C structure significantly increases the electronic states at the Fermi level, thus improving the electronic conductivity, and reduces the K+ diffusion barrier (from 1.95 eV of VO to 1.19 eV), which contributes to its large capacity and superior rate performance. A PIB full cell exhibits 168 mA h g(-1) at 2 A g(-1) and 80% capacity retention over 500 cycles. This work provides some insights into the rational design of metal oxide-based anodes for high-performance PIBs. |
| WOS关键词 | ANODE ; INTERCALATION ; STORAGE ; PSEUDOCAPACITANCE ; COMPOSITE ; SPHERES |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51772283] ; National Key R&D 229 Program of China[2016YFA0401801] ; Hong Kong Scholars Program[XJ2019022] |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000593047100020 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Key R&D 229 Program of China ; Hong Kong Scholars Program |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/105460]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Chen, Qianwang |
| 作者单位 | 1.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 2.City Univ Hong Kong, Dept Mat Sci & Engn, Ctr Super Diamond & Adv Films COSDAF, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 3.Chinese Acad Sci, Hefei Inst Phys Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 4.Anqing Normal Univ, Sch Elect Engn & Intelligent Mfg, Anqing 246052, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Jian,Wang, Changlai,Xia, Guoliang,et al. A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8. |
| APA | Lu, Jian.,Wang, Changlai.,Xia, Guoliang.,Tong, Huigang.,Yang, Yang.,...&Chen, Qianwang.(2020).A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries.JOURNAL OF MATERIALS CHEMISTRY A,8. |
| MLA | Lu, Jian,et al."A robust spring-like lamellar VO/C nanostructure for high-rate and long-life potassium-ion batteries".JOURNAL OF MATERIALS CHEMISTRY A 8(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
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