Facile Synthesis of Birnessite δ-MnO2 and Carbon Nanotube Composites as Effective Catalysts for Li-CO2 Batteries

被引:42
作者
Liu, Qiannan [1 ,2 ]
Hu, Zhe [2 ]
Li, Lin [3 ]
Li, Weijie [2 ]
Zou, Chao [1 ]
Jin, Huile [1 ]
Wang, Shun [1 ]
Chou, Shu-Lei [2 ]
机构
[1] Wenzhou Univ, Inst New Mat & Ind Technol, Key Lab Carbon Mat Zhejiang Prov, Wenzhou 325027, Zhejiang, Peoples R China
[2] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Innovat Campus, North Wollongong, NSW 2522, Australia
[3] Nankai Univ, Coll Chem, Collaborat Innovat Ctr Chem Sci & Engn, Key Lab Adv Energy Mat Chem,Minist Educ, Tianjin 300071, Peoples R China
基金
中国国家自然科学基金;
关键词
CNT@MnO2 composites; catalysts; synergistic effects; oxygen vacancies; Li-CO2; batteries; CRYSTAL-STRUCTURE; MANGANESE OXIDES; OXIDATION; MNO2; NANOPARTICLES; FORMALDEHYDE; DESIGN;
D O I
10.1021/acsami.1c03229
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Li-CO2 batteries are one type of promising energy storage and conversion devices to capture and utilize the greenhouse gas CO2, mitigating global temperature rise and climate change. Catalysts that could effectively decompose the discharge product, Li2CO3, are essential for high-performance Li-CO2 batteries. Benefiting from the interconnected porous structure, favorable oxygen vacancy, and the synergistic effects between the carbon nanotube (CNT) and layered birnessite delta-MnO2, our Li-CO2 cathodes with the as-prepared CNT@delta-MnO2 catalyst can efficiently afford a large reaction surface area and abundant active sites, provide sufficient electron/Li+ transport pathways, and facilitate electrolyte infiltration and CO2 diffusion, demonstrating low overpotential and superior cycling stability, which have been proven by both experimental characterization and theoretical computation. It is expected that this work can provide guidance for the design and synthesis of high-performance electrochemical catalysts for Li-CO2 batteries.
引用
收藏
页码:16585 / 16593
页数:9
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