期刊
SUSTAINABLE ENERGY & FUELS
卷 1, 期 5, 页码 1007-1012出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7se00135e
关键词
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资金
- Purdue School of Engineering and Technology and Department of Mechanical Engineering at Indiana University-Purdue University Indianapolis (IUPUI)
- NSF [MRI-1429241, MRI1229514]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1429241] Funding Source: National Science Foundation
Rechargeable lithium batteries are playing an important role in portable electronics, electric vehicles, and renewable energy storage. Cathode materials in lithium batteries are mainly inorganic; however, some organic materials are also promising for these applications due to their diversified properties. Organosulfides are a unique class of materials which are low cost, abundant, and could provide high capacities. In this work, a phase extraction technique is used to prepare a core-sheath structured composite consisting of carbon nanotubes (CNTs) coated with a layer of phenyl disulfide (PDS, C6H5SSC6H5),which is designated as PDS@CNT. It forms a freestanding and binder-free paper which can be made in a scalable way with high mass loading. In lithium batteries, the S-S bonds in the composite can reversibly break and form in the CNT matrix, enabling good cycling performance. The half-cell can maintain a stable open circuit voltage over a week and deliver a specific capacity of 218 mA h g(-1) at 1C while retaining 70% of the initial capacity after 150 cycles.
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