Journal
NANOSCALE
Volume 10, Issue 8, Pages 3877-3883Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr07500f
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Funding
- National Natural Science Foundation of China [51772335]
- Guangdong Natural Science Foundation [2016A030313346, 2014A030306022]
- Guangdong Youth Top-notch Talent Support Program [2015TQ01C201]
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Carbon nanomaterials with 3D structures as sulfur hosts have been widely developed in lithium-sulfur batteries because of their high specific surface area, high conductivity and structural stability. However, sulfur, loaded by melting-diffusion method, is usually attached to the outside surface of carbon host, resulting in weak adsorption to expose polysulfide. Herein, we report a template-free method for synthesizing graphene-like nano-cell (GLC) with high in situ sulfur loading (S@GLC). The GLC is expected to provide physical adsorption by enclosed graphene cell architecture and chemical adsorption by pyridinic N-doping and oxygen functional group. With these merits, the S@GLC cathode owned high sulfur content (72%) and also, it exhibited a reversible specific capacity of 1253 mA h g(-1) at 0.2C, excellent rate performance, and long cycling stability (502 mA h g(-1) after 400 cycles at 1C).
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