Kim, Changhyeon Kim, Icpyo Kim, Huihun Sadan, Milan K. Yeo, Hyewon Cho, Gyubong Ahn, Jaepyoung Ahn, Jouhyeon Ahn, Hyojun 2024-01-19T21:04:17Z 2024-01-19T21:04:17Z 2021-09-05 2018-12-07 2050-7488 https://pubs.kist.re.kr/handle/201004/120583 For a next-generation sodium battery to replace lithium ion batteries, it is essential to develop an anode with a long cycle life and high rate. Sn is considered to be an ideal candidate for the anode of sodium ion batteries. Here, we report a Sn anode that exhibits ultra-long-term cycle stability with a high capacity of 554 mA h g(-1) at 10C-rate for 5000 cycles. The optimized cell configuration consists of 1,2-dimethoxyethane as the electrolyte, a double separator including a nanoporous membrane, and a Sn anode with MWCNT as a conductive additive. Its capacity retention reaches up to 99.8% and its coulombic efficiency is near 100% for 5000 cycles. Surprisingly, we have discovered that the Sn powder exhibits a self-healing phenomenon during cycling. Sn is initially pulverized into a nanometer-sized powder, and then forms a three-dimensional porous coral-like structure in which ligament-shaped micrometer-sized Sn particles are connected with a low coordination number by room temperature sintering. The coral-like structure is mechanically stable towards volume change and electrically connected. The self-healing structure and mechanism provide a direction for the design of other electrodes with alloying mechanisms. English ROYAL SOC CHEMISTRY HIGH-PERFORMANCE ANODE GLYME-BASED ELECTROLYTE REDUCED GRAPHENE OXIDE TIN NANOPARTICLES ELECTROCHEMICAL PROPERTIES LITHIUM-ION CARBON SODIATION NANOSPHERES COMPOSITES A self-healing Sn anode with an ultra-long cycle life for sodium-ion batteries Article 10.1039/c8ta09544b 1 JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.45, pp.22809 - 22818 JOURNAL OF MATERIALS CHEMISTRY A 6 45 22809 22818 scie scopus 000451738200045 2-s2.0-85057027306 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article HIGH-PERFORMANCE ANODE GLYME-BASED ELECTROLYTE REDUCED GRAPHENE OXIDE TIN NANOPARTICLES ELECTROCHEMICAL PROPERTIES LITHIUM-ION CARBON SODIATION NANOSPHERES COMPOSITES