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K0.67Ni0.17Co0.17Mn0.66O2: A cathode material for potassium-ion battery |
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| Institution: | 1. School of Metallurgy, Northeastern University, Shenyang 110819, PR China;2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China;1. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;2. Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA;3. Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA |
| Abstract: | A novel layered ternary material K0.67Ni0.17Co0.17Mn0.66O2 has been fabricated via a co-precipitation assisted solid-phase method and further evaluated as a cathode for potassium-ion batteries for the first time. Highly reversible K+ intercalation/deintercalation is demonstrated in this material. It delivers a reversible capacity of 76.5 mAh/g with average voltage of 3.1 V and shows good cycling performance with capacity retention of 87% after 100 cycles at 20 mA/g. This work may give a new insight into developing cathode materials for potassium-ion batteries. |
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