Effects of Substitution of Co for Ni on Cycling Stability of Ti-V-Based Electrode Alloys

苗鹤; 刘永锋; 高明霞; 应窕; 李寿权; 葛红卫; 潘洪革

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Effects of Substitution of Co for Ni on Cycling Stability of Ti-V-Based Electrode Alloys

更新时间：2025-12-08

- Effects of Substitution of Co for Ni on Cycling Stability of Ti-V-Based Electrode Alloys
- Vol. 42, Issue 5, Pages: 630-633(2008)
- 作者机构：
  
  浙江大学材料科学与工程系,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG146.22
- Online First：10 May 2008，
  
  Published：2008
- 稿件说明：
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苗鹤, 刘永锋, 高明霞, et al. Effects of Substitution of Co for Ni on Cycling Stability of Ti-V-Based Electrode Alloys[J]. 2008, 42(5): 630-633.
DOI：

苗鹤, 刘永锋, 高明霞, et al. Effects of Substitution of Co for Ni on Cycling Stability of Ti-V-Based Electrode Alloys[J]. 2008, 42(5): 630-633. DOI：

摘要

研究了储氢电极合金Ti

0.8

0.2

2.7

0.5

0.6

1.25-x

0.2

(x=0.00 ～ 0.20)的循环稳定性

并探讨了该系列合金电极的本征/非本征衰退机理.研究结果表明

随着Co含量的增加

合金电极的循环稳定性呈现先提高后下降的趋势.电解液化学成分分析结果显示

随着Co含量的增加

合金中的有效吸氢元素(V与Ti)在电解液中的溶出数量呈现先减少后增加的趋势.此外

随Co含量的增加

在充放电循环过程中合金颗粒的粉化得到抑制

合金电极交换电流密度的下降趋势也逐渐减小.

Abstract

The effects of substitution of Co for Ni on the cycling stability of Ti

0.8

0.2

2.7

0.5

-Cr

0.6

1.25-x

0.2

(x=0.00 - 0.20)hydrogen storage alloys were investigated

and its intrinsic/extrinsic degradation mechanism was analyzed. The results show that the cycling stability of this type of alloy strengthens firstly and then weakens with increasing x from 0.00 to 0.20. Furthermore

the dissolution amount of the hydrogen absorbing elements(Ti and V)in KOH solution decreases firstly and then increases with increasing Co content after the same charge/discharge cycles

and the pulverization of the alloy particles and the deterioration of the electrode s

urface are suppressed with increasing x value.

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references

KOHNO T, YOSHIDA H, KAWASHIMA F, et al. Double-phase hydride forming compounds: a new class of highly electrocatalytic materials [J]. Journal of Electrochemical Society, 1991, 138(7): 1877-1885.

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