Weizu Du , Penglin Zhang , Xiujuan Chen , Junfeng Ke , Kangkang Chang
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引用次数: 0
摘要
本文利用离子掺杂对环形 Fe2O3 阳极材料进行了改性。采用水热法制备了掺杂不同浓度 Cu 的环形 Fe2O3 阳极材料。掺杂 Cu 后,环形 Fe2O3 的整体形貌没有发生变化,而晶格形变导致了更多氧空位的产生,从而提高了锂存储容量。掺杂 Cu 的环形 Fe2O3 表现出优异的循环和倍率性能,其中掺杂 3% Cu 的 Fe2O3 材料电化学性能最好,在 0.1C 电流密度下循环 100 次后比容量为 862.6 mAh g-1,倍率性能也较好。实验结果表明,离子掺杂可有效改善 Fe2O3 阳极材料的电化学性能。
Cu-doped ring-shaped Fe2O3 as high-capacity and high-rate anode for lithium-ion batteries
In this paper, ring-shaped Fe2O3 anode materials were modified by using ion doping. Ring-shaped Fe2O3 anode materials doped with different concentrations of Cu were prepared by hydrothermal method. The overall morphology of ring-shaped Fe2O3 did not change after Cu doped while the lattice deformation led to the generation of more oxygen vacancies and thus enhanced the lithium storage capacity. The Cu doped ring-shaped Fe2O3 showed excellent cycling and multiplicity performance, and the Fe2O3 material with 3 % Cu doped had the best electrochemical performance, with a specific capacity of 862.6 mAh g−1 after 100 cycles at a current density of 0.1C and a better multiplicity performance. The experimental results indicated that the electrochemical performance of Fe2O3 anode materials can be effectively improved by ion doping.
期刊介绍:
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
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