铋铁氧体
兴奋剂
电化学
材料科学
储能
电解质
铋
离子
铁氧体(磁铁)
石墨烯
陶瓷
纳米技术
电化学能量转换
无机化学
化学工程
冶金
复合材料
电极
化学
多铁性
铁电性
光电子学
电介质
物理化学
有机化学
量子力学
功率(物理)
工程类
物理
作者
Chaojie Ma,Na Li,Wei‐Li Song
标识
DOI:10.3389/fmats.2020.00015
摘要
Bismuth ferrite (BFO) is considered as a significant (ABO3) perovskite ceramic in electronics and energy storage. Since the A site (Bi3+) presents electrochemical active feature, electrochemical performance of perovskite bismuth ferrite for serve as an electrode material is improved by proper calcium ions doping in the aqueous basic electrolyte environment. For substantially promoting the electronic transport capabilities, Ca2+ ions are used for substituting partial Bi3+ ions at A site introducing oxygen vacancies. The electrochemical performance suggests that utilization of 10% Ca2+ doping (BFO-10%Ca) would offer 305.5 mAh g-1 at 1 A g-1. Specifically, the assembled BFO-10%Ca //graphene asymmetric energy storage devices could deliver a stable energy storage capability up to 3000 cycles at a current density of 5 A g-1. The results indicate that heterogeneous ion doping would be effective strategy for improving the electrochemical performance for application energy storage.
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