Phase Control on Surface for the Stabilization of High Energy Cathode Materials of Lithium Ion Batteries
The development of high energy electrode materials for lithium ion batteries is challenged by their inherent instabilities, which become more aggravated as the energy densities continue to climb, accordingly causing increasing concerns on battery safety and reliability. Here, taking the high voltage...
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| Veröffentlicht in: | Journal of the American Chemical Society 2019-03, Vol.141 (12), p.4900-4907 |
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| creator | Piao, Jun-Yu Gu, Lin Wei, Zengxi Ma, Jianmin Wu, Jinpeng Yang, Wanli Gong, Yue Sun, Yong-Gang Duan, Shu-Yi Tao, Xian-Sen Bin, De-Shan Cao, An-Min Wan, Li-Jun |
| description | The development of high energy electrode materials for lithium ion batteries is challenged by their inherent instabilities, which become more aggravated as the energy densities continue to climb, accordingly causing increasing concerns on battery safety and reliability. Here, taking the high voltage cathode of LiNi0.5Mn1.5O4 as an example, we demonstrate a protocol to stabilize this cathode through a systematic phase modulating on its particle surface. We are able to transfer the spinel surface into a 30 nm shell composed of two functional phases including a rock-salt one and a layered one. The former is electrochemically inert for surface stabilization while the latter is designated to provide necessary electrochemical activity. The precise synthesis control enables us to tune the ratio of these two phases, and achieve an optimized balance between improved stability against structural degradation without sacrificing its capacity. This study highlights the critical importance of well-tailored surface phase property for the cathode stabilization of high energy lithium ion batteries. |
| doi_str_mv | 10.1021/jacs.8b13438 |
| format | Article |
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| subjects | Electrodes ENERGY STORAGE Layers Oxides Phase transitions Spinel |
| title | Phase Control on Surface for the Stabilization of High Energy Cathode Materials of Lithium Ion Batteries |
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