论文成果
Heterointerface Engineered Core-Shell Fe<sub>2</sub>O<sub>3</sub>@TiO<sub>2</sub> for High-Performance Lithium-Ion Storage
- 发布时间：2024-01-19
- 点击次数：
- 关键字：INITIO MOLECULAR-DYNAMICS; GRAPHENE; ANODE; ELECTROLYTES; FABRICATION; BATTERIES; CAPACITY; ARRAYS; FE3O4
- 摘要：The rational design of the heterogeneous interfaces enables precise adjustment of the electronic structure and optimization of the kinetics for electron/ion migration in energy storage materials. In this work, the built-in electric field is introduced to the iron-based anode material (Fe2O3@TiO2) through the well-designed heterostructure. This model serves as an ideal platform for comprehending the atomic-level optimization of electron transfer in advanced lithium-ion batteries (LIBs). As a result, the core-shell Fe2O3@TiO2 delivers a remarkable discharge capacity of 1342 mAh g(-1) and an extraordinary capacity retention of 82.7% at 0.1 A g(-1) after 300 cycles. Fe2O3@TiO2 shows an excellent rate performance from 0.1 A g(-1) to 4.0 A g(-1). Further, the discharge capacity of Fe2O3@TiO(2 )reached 736 mAh g(-1) at 1.0 A g(-1) after 2000 cycles, and the corresponding capacity retention is 83.62%. The heterostructure forms a conventional p-n junction, successfully constructing the built-in electric field and lithium-ion reservoir. The kinetic analysis demonstrates that Fe2O3@TiO2 displays high pseudocapacitance behavior (77.8%) and fast lithium-ion reaction kinetics. The capability of heterointerface engineering to optimize electrochemical reaction kinetics offers novel insights for constructing high-performance iron-based anodes for LIBs.
- 卷号：28
- 期号：19
- 是否译文：否