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TiO2 quantum dots confined in 3D carbon framework for outstanding surface lithium storage with improved kinetics.
Yin, Jinpeng; Yu, Jiayao; Shi, Xiaorong; Kong, Weiqiang; Zhou, Zhaoyang; Man, Jianzong; Sun, Juncai; Wen, Zhongsheng.
Afiliación
  • Yin J; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Yu J; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Shi X; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Kong W; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Zhou Z; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Man J; Department of Materials, Dalian Maritime University, Dalian 116026, China.
  • Sun J; Department of Materials, Dalian Maritime University, Dalian 116026, China. Electronic address: Sunjc@dlmu.edu.cn.
  • Wen Z; Department of Materials, Dalian Maritime University, Dalian 116026, China. Electronic address: zswen5@gmail.com.
J Colloid Interface Sci ; 582(Pt B): 874-882, 2021 Jan 15.
Article en En | MEDLINE | ID: mdl-32916579
Pseudocapacitive lithium storage is an effective way to promote the improvement of electrochemical performance for lithium ion batteries. However, the intrinsically sluggish lithium ionic diffusion and the low electronic conductivity of TiO2 limit its capability of pseudocapacitive behavior with fast surface redox reaction. In this work, TiO2 quantum dots confined in 3-dimensional carbon framework have been synthesized by a facile process of reverse microemulsion method combined with heat treatment. The obtained composites effectively combine electrochemical redox with surface pseudocapacitive, showing excellent electrochemical properties. An ultra-high discharge capacity of 370.5 mAh/g can be retained after 200 cycles at a current density of 0.1 A/g. Ultra-long life extends to 10,000 cycles with an average capacity loss of as low as 0.00314% per cycle can be obtained at a high current density of 5.0 A/g, due to the high pesudocapacitance contribution of fast surface redox reaction. Furthermore, the practice application of the obtained electrode is also investigated in a full cell with LiCoO2 as the cathode and a high capacity retention of 93.5% is maintained after 100 cycles at the current density of 0.1 A/g.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2021 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos