4.8 Article

Cubic Crystal-Structured SnTe for Superior Li- and Na-Ion Battery Anodes

Journal

ACS NANO
Volume 11, Issue 6, Pages 6074-6084

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b02039

Keywords

lithium-ion batteries; sodium-ion batteries; tin telluride; Sn-based compound anodes; Te-based compound anodes

Funding

  1. National Research Foundation of Korea (NRF) - Korea Government (MSIP) [NRF-2014R1A2A1A11053057]
  2. MSIP (Ministry of Science, ICT and Future Planning), Korea, under the ITRC (Information Technology Research Center) support program [IITP-2017-2014-0-00639]
  3. Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [2014-0-00639-002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  4. National Research Foundation of Korea [2014R1A2A1A11053057] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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A cubic crystal-structured Sn-based compound, SnTe, was easily synthesized using a solid-state synthetic process to produce a better rechargeable battery, and its possible application. as a Sn-based high-capacity anode material for Li-ion batteries (LIBs) and Na-ion batteries (NIBs) was investigated. The electrochemically driven phase change mechanisms of the SnTe electrodes during Li and Na insertion/extraction were thoroughly examined utilizing various ex situ analytical techniques. During Li insertion, SnTe was converted to Li4.25Sn and Li2Te; meanwhile, during Na insertion, SnTe experienced a sequential topotactic transition to NaxSnTe (x <= 1.5) and conversion to Na3.75Sn and Na2Te, which recombined into the original SnTe phase after full Li and Na extraction. The distinctive phase change mechanisms provided remarkable electrochemical Li- and Na-ion storage performances, such as large reversible capacities with high Coulombic efficiencies and stable cyclabilities with fast C-rate characteristics, by preparing amorphous-C-decorated nanostructured SnTe-based composites. Therefore, SnTe, with its interesting phase change mechanisms, will be a promising alternative for the oncoming generation of anode materials for LIBs and NIBs.

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