摘要
Ti0.26Zr0.07V0.24Mn0.1Ni0.33Bx （x=0～0.10）系列合金均有V基固溶体相和C14型Laves相两相组成.添加B可提高Ti0.26Zr0.07V0.24Mn0.1Ni0.33合金的放电容量,Ti0.26Zr0.07V0.24Mn0.1Ni0.33B0.1合金电极在60 mA·g-1电流放电时的放电容量达到476.7 mAh·g-1.B的添加不同程度地降低了合金的高倍率放电性能,使合金电极表面上电化学反应的电荷转移电阻（Rct）显著增加,交换电流密度（I0）显著降低.添加B可显著改善Ti0.26Zr0.07V0.24Mn0.1Ni0.33合金电极的高温放电性能,Ti0.26Zr0.07V0.24Mn0.1Ni00.025B合金电极在343 K高温下其放电容量达到525.6 mAh·g-1.
The results show that all alloys are composed of V-based solid solution with body-centered-cube （BCC） structure and C14 Laves phase with hexagonal structure. The addition of B increases the discharge capacity of Ti0.26Zr0.07V0.24Mn0.1Ni0.33 alloy electrode and Ti0.26Zr0.07V0.24Mn0.1Ni0.33B0.1 alloy delivers the discharge capacity of 476.7 mAh. g-lat discharge current of 60 mA. g-1. The addition of B decreases the high-rate discharge ability of the alloy electrode in some extent. EIS indicates that addition of B decreases the dynamic performance, which makes the charge transfer resistance （Rct） increases and the exchange current density （Io） decreases markedly. Considerable improvement in the high-temperature dischargeability is observed by addition of B, and the discharge capacity is up to 525.6 mAh. g-1 at 343 K for Ti0.26Zr0.07V0.24Mn0.1Ni0.33B0.025 alloy electrode.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2013年第10期2119-2125,共7页
Chinese Journal of Inorganic Chemistry
基金
河北省自然科学基金(No.B2010001132)资助项目
关键词
贮氢合金
电化学性能
硼
hydrogen storage alloy
electrochemical characteristics
boron
