کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5452404 1513727 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
CommunicationAn in-plane heterostructure of graphene and titanium carbide for efficient polysulfide confinement
ترجمه فارسی عنوان
ارتباط ساختار ساختاری گرافن و کاربید تیتانیوم در محوطه پلی سولفید کارآمد
کلمات کلیدی
هترواستراتژی در هواپیما، کاربید تیتانیوم قالب گرافن، باتری های گوگردی لیتیم،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی


- An in-plane heterostructure constructed by graphene and conductive titanium carbide (TiC) is prepared.
- A part of graphene was transformed into TiC using graphene as the template and carbon source.
- The coating layer constructed by such heterostructures on separator effectively restrains the polysulfide shuttling.

Lithium polysulfide (LiPS) shuttling is one of the main obstacles hindering the practical use of lithium-sulfur (Li-S) batteries. Constructing an interlayer composed of carbon or noncarbon materials on separator is a promising way to restrain the LiPS shuttling, but such a layer always hinders the Li ion diffusion and is hard to realize the reuse of the captured LiPSs. In this study, an in-plane heterostructure constructed by graphene and titanium carbide (TiC) was prepared by directly using graphene as a template and the carbon source to react with TiCl4 under thermal treatment. In this process, graphene was partially transformed into TiC forming such a heterostructure, which is benefit to reducing the Li ion and electron diffusion barrier. Moreover, the TiC has strong affinity towards LiPSs and high conductivity. Thus, the in-plane heterostructures filtered on a separator as a coating layer effectively blocks the shuttle of LiPSs and greatly improves the sulfur utilization and cycling performance, indicating a promising way to promote the practical applications of high performance Li-S batteries.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nano Energy - Volume 39, September 2017, Pages 291-296
نویسندگان
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