Stabilizing the Performance of High-Capacity Sulfur Composite Electrodes by a New Gel Polymer Electrolyte Configuration

被引:27
作者
Agostini, Marco [1 ]
Lim, Du Hyun [1 ]
Sadd, Matthew [1 ,2 ]
Fasciani, Chiara [3 ]
Navarra, Maria Assunta [4 ]
Panero, Stefania [4 ]
Brutti, Sergio [5 ]
Matic, Aleksandar [1 ]
Scrosati, Bruno [3 ]
机构
[1] Chalmers, Dept Phys, S-41296 Gothenburg, Sweden
[2] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England
[3] Ist Italiano Tecnol, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy
[4] Sapienza Univ Roma, Dipartimento Chim, Ple Aldo Moro 5, I-00185 Rome, Italy
[5] Univ Basilicata, Dipartimento Sci, Vle Ateneo Lucano 10, I-85100 Potenza, Italy
关键词
batteries; energy storage; gel polymer electrolytes; sulfur; raman spectroscopy; LITHIUM BATTERIES; RECHARGEABLE BATTERY; POLYSULFIDE SHUTTLE; RAMAN-SPECTROSCOPY; GRAPHENE OXIDE; ENERGY-STORAGE; LI-ION; CARBON; CATHODE; CELLS;
D O I
10.1002/cssc.201700977
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Increased pollution and the resulting increase in global warming are drawing attention to boosting the use of renewable energy sources such as solar or wind. However, the production of energy from most renewable sources is intermittent and thus relies on the availability of electrical energy-storage systems with high capacity and at competitive cost. Lithium-sulfur batteries are among the most promising technologies in this respect due to a very high theoretical energy density (1675mAhg(-1)) and that the active material, sulfur, is abundant and inexpensive. However, a so far limited practical energy density, life time, and the scaleup of materials and production processes prevent their introduction into commercial applications. In this work, we report on a simple strategy to address these issues by using a new gel polymer electrolyte (GPE) that enables stable performance close to the theoretical capacity of a low cost sulfur-carbon composite with high loading of active material, that is, 70% sulfur. We show that the GPE prevents sulfur dissolution and reduces migration of polysulfide species to the anode. This functional mechanism of the GPE membranes is revealed by investigating both its morphology and the Li-anode/GPE interface at various states of discharge/charge using Raman spectroscopy.
引用
收藏
页码:3490 / 3496
页数:7
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