Influence of Sm doping on thermodynamics and electrochemical performance of AB(5+z) alloys in low-temperature and high-power Ni-metal hydride batteries

时间:2021-09-16作者:浏览量:128


Influence of Sm doping on thermodynamics and electrochemical performance of AB(5+z) alloys in low-temperature and high-power Ni-metal hydride batteries

作者:Jiang, WB (Jiang, Wenbin)[ 1,2 ] ; Tan, C (Tan, Cheng)[ 1,2 ] ; Huang, JL (Huang, Jianling)[ 1,2 ] ; Ouyang, LZ (Ouyang, Liuzhang)[ 1,2,4,5 ] ; Chen, M (Chen, Min)[ 1,2,3 ] ; Min, D (Min, De)[ 3 ] ; Liao, CH (Liao, CanHui); Tang, RH (Tang, RenHeng)[ 6 ] ; Zhu, M (Zhu, Min)[ 1,2 ]

 

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JOURNAL OF POWER SOURCES

 

: 493

文献号: 229725

 

DOI: 10.1016/j.jpowsour.2021.229725

 

出版年: MAY 1 2021

 

文献类型:Article

 

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摘要

AB(5)-type negative electrode materials have been extensively used for Ni-metal hydride batteries. However, their rate capabilities have hindered them from being more extensively applied, especially in hybrid electric vehicles at low temperatures. Here, a hyper-stoichiometric AB(5.09) alloy is designed and Sm is doped to achieve highpower performance. The influence of the microstructural characteristics, thermodynamic stabilities and comprehensive electrochemical performance resulting from the substitution of Sm for La and Ce is investigated. This work demonstrates that the addition of Sm results in a decrease in the maximum capacity and hydride stability. Furthermore, with the stress concentration relieving effect from the increase of anisotropy of the c/a ratio, the cycling stability increases significantly. Due to the formation of the Ni2MnAl catalytic phase, all alloys possess a high density of phase boundaries and exhibit good high-rate discharge performance. The high-rate dischargeability and specific power are further improved after Sm doping, with the high-rate discharge capacity retention rate reaching 81.4% at 3000 mA g(-1). Although Sm adversely affects the surface catalytic properties of the electrodes, the high Sm content alloy exhibits higher specific power and discharge capacity at -40 degrees C due to the decrease in hydride stability.

 

关键词

作者关键词:Samarium substitution; AB(5.09) hydrogen storage alloy; Ni-MH batteries; High-rate dischargeability; Low-temperature electrochemical performance

 

作者信息

通讯作者地址:

 

South China University of Technology South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.

South China University of Technology South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China.

Guangdong Res Inst Rare Met, Guangdong Prov Key Lab Rare Earth Dev & Applicat, Guangzhou 510650, Peoples R China.

通讯作者地址: Ouyang, LZ (通讯作者)

 

显示更多       South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.

通讯作者地址: Ouyang, LZ (通讯作者)

显示更多       South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China.

通讯作者地址: Tang, RH (通讯作者)

          Guangdong Res Inst Rare Met, Guangdong Prov Key Lab Rare Earth Dev & Applicat, Guangzhou 510650, Peoples R China.

地址:

 

显示更多       [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China

显示更多       [ 2 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Peoples R China

          [ 3 ] Sihui City Double Win Ind CO LTD, Sihui City, Peoples R China

          [ 4 ] China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Peoples R China

          [ 5 ] Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China

          [ 6 ] Guangdong Res Inst Rare Met, Guangdong Prov Key Lab Rare Earth Dev & Applicat, Guangzhou 510650, Peoples R China

电子邮件地址:meouyang@scut.edu.cn; tangrenhgz@163.com

 

基金资助致谢

基金资助机构显示详情       授权号

National Key R&D Program of China

 

2019YFB1505101

National Natural Science Foundation of China (NSFC)

 

51771075

National Natural Science Foundation of China (NSFC)

 

NSFC51621001

National Natural Science Foundation of Guangdong Province

 

2016A030312011

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出版商

ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS

 

期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry; Electrochemistry; Energy & Fuels; Materials Science

 

Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary