A Freestanding Cathode Electrode Design for High-Performance Sodium Dual-Ion Battery

J. Phys. Chem. C, Just Accepted Manuscript
DOI: 10.1021/acs.jpcc.7b08429
Publication Date (Web): October 17, 2017
Copyright © 2017 American Chemical Society

Advanced Rechargeable Aluminum Ion Battery with a High Quality Natural Graphite Cathode

Di-Yan Wang,1,2,3 Chuan-Yu Wei,1,4 Meng-Chang Lin,3,5Chun-Jern Pan,3,6 Hung-Lung Chou,7 Hsin-An Chen,4Ming Gong,3 Yingpeng Wu,3 Chunze Yuan,3 Michael Angell,3 Yu-Ju Hsieh,1 Yu-Hsun Chen,1Cheng-Yen Wen,4 Chun-Wei Chen,4 Bing-Joe Hwang,6,8* Chia-Chun Chen,1,9* Hongjie Dai3*

Nature Communications 2017, 8, 14283



Recently interest in aluminum ion batteries with aluminum anodes, graphite cathodes and ionic liquid electrolytes has increased; however much remains to be done to increase the cathode capacity and to understand details of the anion-graphite intercalation mechanism. In this study an aluminum-ion-battery cell, made using pristine natural graphite flakes,achieves a specific capacity of ~110 mAhg-1 with Coulombic efficiency~98%, at a current density of 99 mAg-1(0.9C) with clear discharge voltage plateaus (2.25 to 2.0V and 1.9 to 1.5V). The cell has a capacity of 60 mAhg-1 at 6C, over 6000 cycles with Coulombic efficiency~99%. Raman spectroscopy showes two  different intercalation processes involving chloroaluminateanions at the two discharging plateaus, while C-Cl bonding on the surface, or edges of nature graphite, is found using X-ray absorption spectroscopy. Finally, theoretical calculations are employed to investigate the intercalation behavior of choloraluminate anions in the graphite electrode.

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Dec. 4 2016, Congratulations "Hsiang-Ju receive an excellent poster award in 2016化學年會"

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Our manuscript "Improving Hydrogen Evolution Activity of Earth-abundant Cobalt-doped Iron Pyrite Catalysts by Surface Modification with Phosphide" has been accepted by Small
Tsung-Rong Kuo, Wei-Ting Chen, Hsiang-Ju Liao, Yu-Hsiu Yang, Ting-Wei Liao,Cheng-Yen Wen, Chia-Chun Chen,* Di-Yan Wang*


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