| Title | Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation |
| Authors | Li, Haisheng Xu, Kui Chen, Pohua Yuan, Youyou Qiu, Yi Wang, Ligang Zhu, Liu Wang, Xiaoge Cai, Guohong Zheng, Liming Dai, Chun Zhou, Deng Zhang, Nian Zhu, Jixin Xie, Jinglin Liao, Fuhui Peng, Hailin Peng, Yong Ju, Jing Lin, Zifeng Sun, Junliang |
| Affiliation | Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China Nanjing Tech Univ, Key Lab Flexible Elect, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Nanjing 211816, Peoples R China King Abdullah Univ Sci & Technol, Core Labs, Thuwal 239556900, Saudi Arabia Lanzhou Univ, Elect Microscopy Ctr, Lanzhou 30000, Peoples R China China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China Peking Univ, Analyt Instrumentat Ctr, Beijing 100871, Peoples R China Lanzhou Univ, Sch Phys Sci & Technol, Electron Microscopy Ctr, Lanzhou 730000, Peoples R China Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Peoples R China |
| Keywords | HIGH-ENERGY MXENE ELECTRODES |
| Issue Date | 4-Jun-2022 |
| Publisher | NATIONAL SCIENCE REVIEW |
| Abstract | The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides (MXenes). We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti3C2 MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g(-1) (2000 F cm(-3)) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of 'computational and experimental microscopy'. We believe that an understanding of, and a manipulation strategy for, nanoconfined water will shed light on ways to improve the electrochemical performance of MXene and other two-dimensional materials. Record-breaking electrochemical energy storage performance achieved in titanium carbides (MXenes) by surface design and nanoconfined water manipulation, with its atomic mechanism revealed. |
| URI | http://hdl.handle.net/20.500.11897/647433 |
| ISSN | 2095-5138 |
| DOI | 10.1093/nsr/nwac079 |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
