硼的添加对Ti0.26Zr0.07V0.24Mn0.1Ni0.33贮氢合金结构和电化学性能的影响  

Effect of Addition of Boron on Structure and Electrochemical Characteristic of Ti_(0.26)Zr_(0.07)V_(0.24)Mn_(0.1)Ni_(0.33) Alloy

作　　者：李书存[1,2] 赵敏寿[1,3] 焦体峰[1] 

机构地区：[1]秦皇岛燕山大学环境与化学工程学院,秦皇岛066004 [2]秦皇岛燕山大学亚稳材料制备技术与科学实验室,秦皇岛066004 [3]中国科学院长春应用化学研究所稀土化学与物理重点实验室.长春130022

出　　处：《无机化学学报》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

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.

关 键 词：贮氢合金 电化学性能 硼 

分 类 号：O613.81[理学—无机化学] TG139.7[理学—化学]