Ga2Te3-Based Composite Anodes for High-Performance Sodium-Ion Batteriesopen access
- Authors
- Vo Pham Hoang Huy; Kim, Il Tae; Hur, Jaehyun
- Issue Date
- Sep-2022
- Publisher
- MDPI
- Keywords
- Ga2Te3; Ga2Te3-TiO2-C; anodes; Na ion; sodiation; desodiation
- Citation
- MATERIALS, v.15, no.18
- Journal Title
- MATERIALS
- Volume
- 15
- Number
- 18
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/85910
- DOI
- 10.3390/ma15186231
- ISSN
- 1996-1944
- Abstract
- Recently, metal chalcogenides have received considerable attention as prospective anode materials for sodium-ion batteries (SIBs) because of their high theoretical capacities based on their alloying or conversion reactions. Herein, we demonstrate a gallium(III) telluride (Ga2Te3)-based ternary composite (Ga2Te3-TiO2-C) synthesized via a simple high-energy ball mill as a great candidate SIB anode material for the first time. The electrochemical performance, as well as the phase transition mechanism of Ga2Te3 during sodiation/desodiation, is investigated. Furthermore, the effect of C content on the performance of Ga2Te3-TiO2-C is studied using various electrochemical analyses. As a result, Ga2Te3-TiO2-C with an optimum carbon content of 10% (Ga2Te3-TiO2-C(10%)) exhibited a specific capacity of 437 mAh center dot g(-1) after 300 cycles at 100 mA center dot g(-1) and a high-rate capability (capacity retention of 96% at 10 A center dot g(-1) relative to 0.1 A center dot g(-1)). The good electrochemical properties of Ga2Te3-TiO2-C(10%) benefited from the presence of the TiO2-C hybrid buffering matrix, which improved the mechanical integrity and electrical conductivity of the electrode. This research opens a new direction for the improvement of high-performance advanced SIB anodes with a simple synthesis process.
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Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
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