Pyrochlore-type composite oxide Co2Sb2O7@C: advanced anode material for lithium-ion batteries

被引：2
|
作者：
Liu, Xiaofei [1 ]
Wu, Yuandong [1 ]
Mei, Dajiang [1 ]
Wen, Shaoguo [1 ]
机构：
[1] Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Longteng Rd 333, Shanghai 201620, Peoples R China
来源：
IONICS | 2023年 / 29卷 / 9期
基金：
中国国家自然科学基金;
关键词：
Lithium-ion batteries; Pyrochlore structure; Anode materials; CRYSTAL-STRUCTURE; ANTIMONY OXIDES; TIO2; ANATASE; PERFORMANCE; CARBON; STORAGE; CO; NANOCOMPOSITES; REACTIVITY; NANOSHEETS;
D O I：
10.1007/s11581-023-05144-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The pyrochlore-type material Co2Sb2O7@C was synthesized through high-temperature solid-state reactions. Co2Sb2O7 and Co2Sb2O7@C were characterized by PXRD, XPS, SEM, EDS, and BET. At the current density of 200 mA g(-1), the first cycle discharge capacity of Co2Sb2O7@C is 1266 mAh g(-1). After 100 cycles, the specific discharge capacity can still reach 463 mAh g(-1), which is higher than the 76 mAh g(-1) of Co2Sb2O7. With the increase in scanning rate, the contribution rate of the Co2Sb2O7@C pseudo-capacitor varies from 69.2 to 92.5%. The electrochemical performance is due to the conversion and alloying reaction of Li3Sb, the coating of amorphous carbon, and the contribution of pseudo-capacitance.
引用
收藏
页码：3473 / 3482
页数：10
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