Li/Na/K-ion reaction pathways in Ga and high-performance amorphous Ga composite anodes for Li-ion batteries

被引:4
作者
Lee, Young-Han [1 ,2 ]
Hwang, In-Su [1 ,2 ,3 ]
Choi, Jeong-Hee [4 ,5 ]
Park, Cheol-Min [1 ,2 ]
机构
[1] Kumoh Natl Inst Technol, Sch Mat Sci & Engn, 61 Daehak Ro, Gumi 39177, Gyeongbuk, South Korea
[2] Kumoh Natl Inst Technol, Dept Energy Engn Convergence, Gumi 39177, Gyeongbuk, South Korea
[3] LG Energy Solut, Cylindr Cell Dev Dept 4, Daejeon 34122, South Korea
[4] Korea Electrotechnol Res Inst KERI, Next Generat Battery Res Ctr, 12 Jeongiuiil, Changwon Si 51543, Gyeongsangnam D, South Korea
[5] Univ Sci & Technol UST, Electrofunct Mat Engn, 217 Gajeong Ro, Daejeon 34113, South Korea
基金
新加坡国家研究基金会;
关键词
Lithium-ion batteries; Sodium-ion batteries; Potassium-ion batteries; Gallium-based anode; Amorphous composite; OXIDE-ASSISTED SYNTHESIS; GRAPHENE-OXIDE; ALLOY ANODES; LITHIUM; MECHANISM; EVOLUTION; GRAPHITE; STORAGE; MATRIX;
D O I
10.1016/j.est.2023.107067
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
To achieve high-performance Ga anodes for alkali-ion batteries, the electrochemical Li/Na/K-ion reaction pathways in Ga are thoroughly elucidated using ex situ analytical tools. Ga exhibits a high Li-ion storage reaction owing to the formation of Li2Ga (theoretical capacity: 769 mAh g- 1). However, it exhibits poor Na- and K-ion storage reactions owing to the formation of NaGa4 (theoretical capacity: 96 mAh g- 1) and K3Ga13 (theoretical capacity: 89 mAh g- 1), respectively. The high Li-ion storage reaction in Ga demonstrates its potential as an anode for Li-ion batteries (LIBs). Therefore, we fabricate an amorphous Ga composite (Ga/C) comprising amorphous Ga homogeneously distributed in an amorphous carbon using a simple one-pot solid-state mechanical process. Ga/C exhibits high reversible capacity, long-term Li-ion storage stability, and high rate capability. In addition, threestep confinement of amorphous Ga in the composite during continuous cycling is demonstrated and suggested as an enhancement mechanism for high-performance Ga/C anodes for LIBs. The interesting Li-ion storage reaction in Ga and high-performance amorphous Ga composites are expected to be highly applicable to LIB anodes.
引用
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页数:10
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