摘要
选用LA132、海藻酸钠、β-环糊精和PVDF四种粘合剂应用于锂硫电池正极中,采用恒流充放电、交流阻抗和扫描电镜(SEM)等方法考察了不同粘合剂对锂硫电池电化学性能的影响。其中以海藻酸钠为粘合剂的正极循环性能和倍率性能最为优异,在电流密度100 m A/g下,115次循环后放电比容量为757 m Ah/g,容量保持率达70%。在1 000m A/g电流密度下,放电比容量达到600 m Ah/g。
LA132, sodium alginate（named as SA）, β-cyclodextrin（named as β-CD） and PVDF were used as binders in lithium-sulfur battery. The influence of these four binders on the electrochemical performance of sulfur electrode was investigated by constant current discharge, AC impedance and scanning electron microscopy（SEM）. It was found that SA cathode displayed the best cycling performance and rate performance. It exhibited a discharge specific capacity of 757 m Ah/g and capacity retention of 70% after 115 cycles at a current density of 100 m A/g, much higher than those of cathodes with other binders. Similarly, SA cathode shows the best rate performance of 600 m Ah/g at large current density of 1 000 m A/g in cathodes with four binders.
出处
《电源技术》
CAS
CSCD
北大核心
2016年第3期554-557,共4页
Chinese Journal of Power Sources
基金
国家高技术研究发展计划"863"项目(2012AA052202)
关键词
锂-硫电池
硫正极
水性粘合剂
海藻酸钠
Li-S battery
sulfur-cathode
water-soluble binder
sodium alginate
