SnSe nanocrystals decorated on carbon nanotubes for high-performance lithium-ion battery anodes

Aihua Jin, Sue In Chae, Jae Hyuk Park, Shin Yeong Kim, Sanghwa Lee, Hogeun Chang, Jeong Hyun Kim, Ji Hyun Um, Seung Ho Yu, Taeghwan Hyeon, Yung Eun Sung

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Tin selenide has been considered as one of the most promising anode materials for lithium-ion battery owing to its high theoretical capacity. In this work, a facile colloidal synthetic method was successfully used to obtain nanocomposites comprising ~7 nm SnSe nanocrystals and carbon nanotubes (SnSe NC/CNT). When applied as anode materials in lithium-ion battery, the SnSe NC/CNT nanocomposites exhibited excellent electrochemical performance with a reversible capacity of 706.5 mAh g−1 after 300 cycles at a constant current density of 200 mA g−1. The SnSe NC/CNT nanocomposites also delivered the high reversible capacity of 532.0 mAh g−1 at a high current density of 1.0 A g−1. The SnSe nanocomposites are advantageous to the ion and electron transport. Interconnected by CNT after annealing at 200 °C, SnSe NC/CNT nanocomposites can accommodate the volume expansion even after 300 cycles. The complex conversion and alloying reaction are studied by X-ray diffraction and X-ray absorption near edge structure.

Original languageEnglish
Article number162057
JournalJournal of Alloys and Compounds
Volume892
DOIs
Publication statusPublished - 2022 Feb 5

Keywords

  • Carbon nanotubes
  • Lithium-ion battery
  • Nanocomposites
  • Tin selenide
  • operando X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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