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Journal of Adhesion Science and Technology Volume 27, 2013 - Issue 9
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Articles

Enhanced performance of the sulfur cathode with L-cysteine-modified gelatin binder

Siying Jiang State Key Laboratory of Chemical Resource Engineering Department, The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijng, 100029, China
,
Mengyao Gao State Key Laboratory of Chemical Resource Engineering Department, The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijng, 100029, China
,
Yaqin Huang State Key Laboratory of Chemical Resource Engineering Department, The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijng, 100029, ChinaCorrespondence[email protected]
,
Weikun Wang Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijng, 100191, China
,
Hao Zhang Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijng, 100191, China
,
Zhongbao Yu Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijng, 100191, China
,
Anbang Wang Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijng, 100191, China
,
Keguo Yuan Research Institute of Chemical Defense, West Building, 35 Huayuanbei Road, Beijng, 100191, China
&
Xiaonong Chen State Key Laboratory of Chemical Resource Engineering Department, The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijng, 100029, ChinaCorrespondence[email protected]
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Pages 1006-1011 | Received 04 Apr 2012, Accepted 04 Sep 2012, Published online: 21 Sep 2012
 
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Abstract

A novel binder which is a water-soluble gelatin macromolecule modified with L-cysteine is now being used in the sulfur cathode for rechargeable Li/S battery. Cyclic voltammograms, electrochemical impedance spectroscopy, and cycle performance of the prepared cathode were investigated. The results indicated that this novel binder not only served as a strong dispersion and adhesion agent for the cathode materials, but also formed a stable electric network between the active material and the conductive carbon. Less polarization, lower transfer resistance, and enhanced cycle life were achieved due to its improved electrochemical stability during the charge/discharge processes. The prepared cathode exhibited an initial capacity of 1135 mAh g–1 and a high reversible capacity of 754 mAh g–1 after 50 cycles.

Acknowledgment

The authors are grateful for the funding support by Beijing Municipal Natural Science Foundation (2102037).

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