鈷-鉬雙金屬碳化物修飾隔膜強(qiáng)化鋰硫電池中多硫化鋰的吸附和催化轉(zhuǎn)化(英文)
發(fā)布時(shí)間:2024-01-04 20:20
本文報(bào)道了一種鈷-鉬雙金屬碳化物(Co3Mo3C)催化材料用于修飾鋰硫電池隔膜,強(qiáng)化多硫化鋰的化學(xué)吸附和催化轉(zhuǎn)化.所組裝的電池表現(xiàn)出優(yōu)異的電化學(xué)性能,即使在8.0 mg cm-2的硫面積負(fù)載量條件下,面積比容量仍高達(dá)6.8 mA h cm-2.理論計(jì)算結(jié)果表明,相比于單一金屬碳化物Mo2C,雙金屬碳化物Co3Mo3C具有更多的活性位點(diǎn),更利于化學(xué)固定多硫化鋰,并催化多硫化鋰間相互轉(zhuǎn)化;同時(shí), Ni3Mo3C和Fe3Mo3C亦表現(xiàn)出類似的高催化活性.本研究對(duì)高性能鋰硫電池關(guān)鍵催化材料的設(shè)計(jì)具有一定的指導(dǎo)意義.
【文章頁數(shù)】:13 頁
【文章目錄】:
INTRODUCTION
EXPERIMENTAL SECTION
Synthesis of bimetallic carbide samples
Fabrication of the carbide-modified separator
Material characterizations
Electrochemical measurements
Polysulfide adsorption and electrochemical kinetics tests
First-principles calculations
RESULTS AND DISCUSSION
CONCLUSIONS
本文編號(hào):3877006
【文章頁數(shù)】:13 頁
【文章目錄】:
INTRODUCTION
EXPERIMENTAL SECTION
Synthesis of bimetallic carbide samples
Fabrication of the carbide-modified separator
Material characterizations
Electrochemical measurements
Polysulfide adsorption and electrochemical kinetics tests
First-principles calculations
RESULTS AND DISCUSSION
CONCLUSIONS
本文編號(hào):3877006
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