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110th Anniversary: Concurrently Coating and Doping High-Valence Vanadium in Nickel-Rich Lithiated Oxides for High-Rate and Stable Lithium-Ion Batteries
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-03-05 , DOI: 10.1021/acs.iecr.8b06162 Haifeng Yu 1 , Yugang Li 1 , Yanjie Hu 1 , Hao Jiang 1 , Chunzhong Li 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-03-05 , DOI: 10.1021/acs.iecr.8b06162 Haifeng Yu 1 , Yugang Li 1 , Yanjie Hu 1 , Hao Jiang 1 , Chunzhong Li 1
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Surface engineering and heteroelement doping are recognized as highly effective protocols to enhance nickel (Ni)-rich lithiated oxides. Herein, we report the kilogram-scale preparation of the concurrent coating and doping of high-valence vanadium (V) in Ni-rich LiNi0.815Co0.15Al0.035O2 (denoted as V-NCA) cathode materials. Hydrofluoric acid (HF) is greatly restricted by removing the residual lithium salts after the reaction with a vanadium source. In the subsequent low-temperature process, the coating of vanadium compounds (V2O5, Li3VO4) and the doping of V ions have been realized, which remarkably decreases the dissolution of active materials and the Li+/Ni2+ disorder. Consequently, the stable reversible specific capacity increases by 17.7% at 0.1 C (202.6 mAh g–1) and by 59.6% at 5 C (147 mAh g–1) compared with the pristine NCA. We also assembled a pouch cell of 650 mAh (3.33 g of V-NCA) by choosing graphite as the anode material, in which 89.2% capacity retention is achieved after 500 cycles at 1 C.
中文翻译：
110周年：同时涂覆和掺杂高价，稳定的锂离子电池用富镍氧化锂中的高价钒
表面工程和杂元素掺杂被认为是增强富含镍（Ni）的锂氧化物的高效协议。本文中，我们报告了在富镍的LiNi 0.815 Co 0.15 Al 0.035 O 2（表示为V-NCA）阴极材料中同时涂覆和掺杂高价钒（V）的千克规模制备。与钒源反应后，通过除去残留的锂盐，大大限制了氢氟酸（HF）。在随后的低温过程中，涂覆钒化合物（V 2 O 5，Li 3 VO 4）和V离子的掺杂已实现，这显着减少了活性物质的溶解和Li + / Ni 2+的无序。因此，与原始NCA相比，稳定的可逆比容量在0.1 C（202.6 mAh g –1）下增加了17.7％，在5 C（147 mAh g –1）下增加了59.6％。我们还通过选择石墨作为负极材料组装了650 mAh（3.33 g V-NCA）的袋式电池，在1 C下进行500次循环后，其容量保持率达到89.2％。
更新日期：2019-03-06
中文翻译：
110周年：同时涂覆和掺杂高价，稳定的锂离子电池用富镍氧化锂中的高价钒
表面工程和杂元素掺杂被认为是增强富含镍（Ni）的锂氧化物的高效协议。本文中，我们报告了在富镍的LiNi 0.815 Co 0.15 Al 0.035 O 2（表示为V-NCA）阴极材料中同时涂覆和掺杂高价钒（V）的千克规模制备。与钒源反应后，通过除去残留的锂盐，大大限制了氢氟酸（HF）。在随后的低温过程中，涂覆钒化合物（V 2 O 5，Li 3 VO 4）和V离子的掺杂已实现，这显着减少了活性物质的溶解和Li + / Ni 2+的无序。因此，与原始NCA相比，稳定的可逆比容量在0.1 C（202.6 mAh g –1）下增加了17.7％，在5 C（147 mAh g –1）下增加了59.6％。我们还通过选择石墨作为负极材料组装了650 mAh（3.33 g V-NCA）的袋式电池，在1 C下进行500次循环后，其容量保持率达到89.2％。
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