Engineering 2D Nanofluidic Li-Ion Transport Channels for Superior Electrochemical Energy Storage

Chunshuang Yan; Chade Lv; Yue Zhu; Gang Chen; Jingxue Sun; Guihua Yu

doi:10.1002/adma.201703909

Engineering 2D Nanofluidic Li-Ion Transport Channels for Superior Electrochemical Energy Storage

Adv Mater. 2017 Dec;29(46). doi: 10.1002/adma.201703909. Epub 2017 Oct 17.

Authors

Chunshuang Yan^{1

2}, Chade Lv¹, Yue Zhu², Gang Chen¹, Jingxue Sun¹, Guihua Yu²

Affiliations

¹ MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China.
² Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.

PMID: 29044794
DOI: 10.1002/adma.201703909

Abstract

Rational surface engineering of 2D nanoarchitectures-based electrode materials is crucial as it may enable fast ion transport, abundant-surface-controlled energy storage, long-term structural integrity, and high-rate cycling performance. Here we developed the stacked ultrathin Co₃ O₄ nanosheets with surface functionalization (SUCNs-SF) converted from layered hydroxides with inheritance of included anion groups (OH^- , NO₃^- , CO₃^2- ). Such stacked structure establishes 2D nanofluidic channels offering extra lithium storage sites, accelerated Li-ion transport, and sufficient buffering space for volume change during electrochemical processes. Tested as an anode material, this unique nanoarchitecture delivers high specific capacity (1230 and 1011 mAh g^-1 at 0.2 and 1 A g^-1 , respectively), excellent rate performance, and long cycle capability (1500 cycles at 5 A g^-1 ). The demonstrated advantageous features by constructing 2D nanochannels in nonlayered materials may open up possibilities for designing high-power lithium ion batteries.

Keywords: energy storage; lithium batteries; nanofluidic channels; stacked nanosheets; two-dimensional.