Direct Superassemblies of Freestanding Metal-Carbon Frameworks Featuring Reversible Crystalline-Phase Transformation for Electrochemical Sodium Storage

Biao Kong, Lianhai Zu, Chengxin Peng, Yan Zhang, Wei Zhang, Jing Tang, Cordelia Selomulya, Liudi Zhang, Hanxing Chen, Yang Wang, Yang Liu, Haili He, Jing Wei, Xiaocheng Lin, Wei Luo, Jianping Yang, Zaiwang Zhao, Yong Liu, Jinhu Yang, Dongyuan Zhao

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

High-power sodium-ion batteries (SIBs) with long-term cycling attract increasing attention for large-scale energy storage. However, traditional SIBs toward practical applications still suffer from low rate capability and poor cycle induced by pulverization and amorphorization of anodes at high rate (over 5 C) during the fast ion insertion/extraction process. The present work demonstrates a robust strategy for a variety of (Sb-C, Bi-C, Sn-C, Ge-C, Sb-Bi-C) freestanding metal-carbon framework thin films via a space-confined superassembly (SCSA) strategy. The sodium-ion battery employing the Sb-C framework exhibits an unprecedented performance with a high specific capacity of 246 mAh g -1 , long life cycle (5000 cycles), and superb capacity retention (almost 100%) at a high rate of 7.5 C (3.51A g -1 ). Further investigation indicates that the unique framework structure enables unusual reversible crystalline-phase transformation, guaranteeing the fast and long-cyclability sodium storage. This study may open an avenue to developing long-cycle-life and high-power SIBs for practical energy applications.

Original languageEnglish
Pages (from-to)16533-16541
Number of pages9
JournalJournal of The American Chemical Society
Volume138
Issue number50
DOIs
Publication statusPublished - 2016

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