High-rate dischargeability enhancement of Ni/MH rechargeable batteries by addition of nanoscale CoO to positive electrodes |
| |
| Affiliation: | 1. Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada;2. School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China;1. The Key Laboratory of synthetic and biological colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, China;2. Hangzhou Yanqu Information Technology Co., Ltd, Y2, 2nd Floor, Building 2, Xixi Legu Creative Pioneering Park, No. 712 Wen''er West Road, Xihu District, Hangzhou City 310003, Zhejiang Province, China |
| |
| Abstract: | Nanoscale cobalt oxide (CoO) particles were synthesized by analysis of CoCO3 in vacuum. Four groups of sealed Ni/MH batteries with different ratio of nanoscale CoO in the positive electrodes were assembled. The overall characteristics of Ni/MH batteries were investigated at different discharge rates at room temperature. The high-rate discharge performance of the Ni/MH batteries was improved by the addition of nanoscale CoO in positive electrode as compared with the addition of normal CoO. Under high-rate discharge conditions, the batteries with sufficient nanoscale CoO in positive electrodes presented much better cycling stability, higher discharge mean voltage, lower internal resistance and higher high-rate capacity. The addition of 8 wt.% nanoscale CoO was proved a desired amount to modify the battery performance at high discharge rates. Too much nanoscale CoO contributed no effect on the improvement of overall performance of Ni/MH batteries. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
