Understanding the effect of an in situ generated and integrated spinel phase on a layered li-rich cathode material using a non-stoichiometric strategy
文献类型：期刊论文
| 作者 | Zhang, Jicheng1; Gao, Rui1; Sun, Limei2; Li, Zhengyao1; Zhang, Heng1; Hu, Zhongbo1; Liu, Xiangfeng1 |
| 刊名 | Physical chemistry chemical physics
 |
| 出版日期 | 2016-09-28 |
| 卷号 | 18期号:36页码:25711-25720 |
| ISSN号 | 1463-9076 |
| DOI | 10.1039/c6cp03683j |
| 通讯作者 | Hu, zhongbo(huzq@ucas.ac.cn) ; Liu, xiangfeng(liuxf@ucas.ac.cn) |
| 英文摘要 | Recently, spinel-layered integrated li-rich cathode materials have attracted great interest due to the large enhancement of their electrochemical performances. however, the modification mechanism and the effect of the integrated spinel phase on li-rich layered cathode materials are still not very clear. herein, we have successfully synthesized the spinel-layered integrated li-rich cathode material using a facile non-stoichiometric strategy (ns-lncmo). the rate capability (84 ma h g(-1) vs. 28 ma h g(-1), 10 c), cycling stability (92.4% vs. 80.5%, 0.2 c), low temperature electrochemical capability (96.5 ma h g(-1) vs. 59 ma h g(-1), -20 degrees c), initial coulomb efficiency (92% vs. 79%) and voltage fading (2.77 v vs. 3.02 v, 200 cycles@ 1 c) of spinel-layered integrated li-rich cathode materials have been significantly improved compared with a pure li-rich phase cathode. some new insights into the effect of the integrated spinel phase on a layered li-rich cathode have been proposed through a comparison of the structure evolution of the integrated and li-rich only materials before and after cycling. the li-ion diffusion coefficient of ns-lncmo has been enlarged by about 3 times and almost does not change even after 100 cycles indicating an enhanced structure stability. the integration of the spinel phase not only enhances the structure stability of the layered li-rich phase during charging-discharging but also expands the interslab spacing of the li-ion diffusion layer, and elongates tm-o covalent bond lengths, which lowers the activation barrier of li+-transportation, and alleviates the structure strain during the cycling procedure. |
| WOS关键词 | LITHIUM-ION BATTERIES ; MANGANESE OXIDE ELECTRODES ; X-RAY-DIFFRACTION ; HIGH-CAPACITY ; RATE PERFORMANCE ; SURFACE MODIFICATION ; COMPOSITE CATHODES ; ELECTROCHEMICAL PERFORMANCE ; THERMAL-STABILITY ; CYCLING STABILITY |
| WOS研究方向 | Chemistry ; Physics |
| WOS类目 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000384249300103 |
| 出版者 | ROYAL SOC CHEMISTRY |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2375790 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Hu, Zhongbo; Liu, Xiangfeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China 2.China Inst Atom Energy, Dept Nucl Phys, Beijing 102413, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jicheng,Gao, Rui,Sun, Limei,et al. Understanding the effect of an in situ generated and integrated spinel phase on a layered li-rich cathode material using a non-stoichiometric strategy[J]. Physical chemistry chemical physics,2016,18(36):25711-25720. |
| APA | Zhang, Jicheng.,Gao, Rui.,Sun, Limei.,Li, Zhengyao.,Zhang, Heng.,...&Liu, Xiangfeng.(2016).Understanding the effect of an in situ generated and integrated spinel phase on a layered li-rich cathode material using a non-stoichiometric strategy.Physical chemistry chemical physics,18(36),25711-25720. |
| MLA | Zhang, Jicheng,et al."Understanding the effect of an in situ generated and integrated spinel phase on a layered li-rich cathode material using a non-stoichiometric strategy".Physical chemistry chemical physics 18.36(2016):25711-25720. |
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来源：中国科学院大学
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