碳質(zhì)材料在鋰硫電池中的應(yīng)用研究進(jìn)展
[Abstract]:With the successful commercial use of graphite anode, lithium ion batteries have been widely used in portable electronic devices such as smart phones, notebook computers and so on. After more than 20 years of development, the existing lithium ion batteries based on the positive electrode of lithium compounds are close to its theoretical capacity, but still can not meet the requirements of the rapid development of the electronic industry and the emerging electric vehicle industry. It is urgent to find a battery system with higher energy density. Lithium-sulfur battery system has high theoretical energy density and is the most potential secondary battery in many energy storage systems. However, there are some problems in lithium sulfur batteries, such as the low conductivity of sulfur and the dissolving and migration of polysulfide, which make it difficult to become practical. Nano-carbon materials play an important role in the development of new lithium-sulfur batteries. Through the introduction of nano-carbon, conductive composite cathode materials can be obtained, and the shuttle of polysulfide can be controlled, which is expected to realize the efficient utilization of positive electrode sulfur materials. The composite electrodes based on carbon nanotubes, graphene, porous carbon and their hybrids were reviewed. The relationship between the structure and the performance of lithium-sulfur batteries was analyzed, and the development trend of lithium-sulfur batteries was prospected.
【作者單位】: 清華大學(xué)化學(xué)工程系 綠色反應(yīng)工程與工藝北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金(21306103) 教育部博士點(diǎn)基金(20120002120047) 中國博士后基金(2012M520293,2013T60125)~~
【分類號(hào)】:TM912;TQ127.11
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