Ti_4O_7正极添加剂在铅蓄电池中的应用  

The application of Ti_4O_7 positive additive to lead-acid battery

作　　者：高根芳 朱健[1] 代飞[1] 何文祥[1] 

机构地区：[1]天能电池集团有限公司,浙江长兴313100

出　　处：《蓄电池》2015年第2期59-61,74,共4页Chinese LABAT Man

摘　　要：选用Magneli相的Ti4O7作为铅酸蓄电池正极添加剂,运用线性扫描伏安法、交流阻抗谱法和充放电循环等表征方法,考察了添加不同含量的Ti4O7添加剂对铅酸蓄电池电极析氧过电位、放电容量和电池循环寿命的影响。结果表明,Ti4O7的添加能够有效提高析氢析氧过电位,抑制水分的分解;其高的导电性和分散性,能够提高活性物利用率,抑制不可逆硫酸盐化,延长电池的循环寿命。当Ti4O7的添加量为铅粉质量的0.2%时,蓄电池的容量提高了11.72%,而当Ti4O7的添加量为铅粉质量的0.5%时,寿命最高,提高了约16.81%。The Ti4O7 oxides of Magneli phase was selected as positive additive of lead-acid battery. The effects of different content of Ti4O7 oxides on the over-potential of oxygen evolution, discharge capacity and cycle life of lead-acid battery were characterized by linear sweep voltammetry, electrochemical impedance spectroscopy, discharge capacity and cycle life tests, respectively. The results showed that the addition of Ti4O7 oxides could inhibit the dissolution of water by increasing the over-potentials of hydrogen and oxygen evolution. Ti4O7 could also improve the utilization of active materials and restrain the size of PbSO4 particles and irreversible sulfation. The charge-discharge test results showed that the discharge capacity and cycle life were improved by 11.72%and 16.81%when the addition amount of Ti4O7 were 0.5 wt%and 0.2 wt%respectively.

关 键 词：Ti4O7 正极添加剂 铅酸蓄电池 循环寿命 

分 类 号：TM912.1[电气工程—电力电子与电力传动]