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Citation: TANG Zhi-Yuan, ZHANG Xiao-Yang, LIU Yuan-Gang, LIU Yong. High Temperature Performance of Ni-MH Positive Electrode Added with Na₂WO₄[J]. Acta Physico-Chimica Sinica, ;2006, 22(07): 895-898. doi: 10.3866/PKU.WHXB20060726 shu

High Temperature Performance of Ni-MH Positive Electrode Added with Na₂WO₄

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

Received Date: 21 November 2005
Available Online: 27 June 2006

Different contents of Na2WO4 reagents were added to nickel positive electrode to enhance its high temperature performance. The results showed that, compared with blank electrode without Na2WO4, positive nickel electrode with Na2WO4 displayed an improved high temperature charging performance. Under the conditions of 70 ℃ and 1.0%(w) Na2WO4, high temperature charging efficiency over 85% was obtained for nickel positive electrode. Moreover, Na2WO4 was also favorable for the discharging capacity, cycle life, and charge retention. It was also found that, when Na2WO4 was added into nickel positive electrode, the main charging oxidation reaction of Ni(OH)2 was accelerated as well as oxygen extraction over-potential.
- Sodium tungstate;High-temperature performance;Positive electrode additive;Cell;Ni/MH
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沈阳化工大学材料科学与工程学院沈阳 110142

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High Temperature Performance of Ni-MH Positive Electrode Added with Na2WO4

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通讯作者: 陈斌, bchen63@163.com

High Temperature Performance of Ni-MH Positive Electrode Added with Na₂WO₄