Savunthari Kirankumar Venkatesan, Chen Chien-Hung, Chen You-Ruei, Tong Zizheng, Iputera Kevin, Wang Fu-Ming, Hsu Chun-Chuan, Wei Da-Hua, Hu Shu-Fen, Liu Ru-Shi
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 106, Taiwan.
ACS Appl Mater Interfaces. 2021 Sep 22;13(37):44266-44273. doi: 10.1021/acsami.1c11000. Epub 2021 Sep 8.
An effective Ru/CNT electrocatalyst plays a crucial role in solid-state lithium-carbon dioxide batteries. In the present article, ruthenium metal decorated on a multi-walled carbon nanotubes (CNTs) is introduced as a cathode for the lithium-carbon dioxide batteries with LiAlGe(PO) solid-state electrolyte. The Ru/CNT cathode exhibits a large surface area, maximum discharge capacity, excellent reversibility, and long cycle life with low overpotential. The electrocatalyst achieves improved electrocatalytic performance for the carbon dioxide reduction reaction and carbon dioxide evolution reaction, which are related to the available active sites. Using the Ru/CNT cathode, the solid-state lithium-carbon dioxide battery exhibits a maximum discharge capacity of 4541 mA h g and 45 cycles of battery life with a small voltage gap of 1.24 V compared to the CNT cathode (maximum discharge capacity of 1828 mA h g, 25 cycles, and 1.64 V as voltage gap) at a current supply of 100 mA g with a cutoff capacity of 500 mA h g. Solid-state lithium-carbon dioxide batteries have shown promising potential applications for future energy storage.
一种高效的钌/碳纳米管电催化剂在固态锂二氧化碳电池中起着至关重要的作用。在本文中，负载在多壁碳纳米管（CNTs）上的钌金属被用作具有LiAlGe(PO)固态电解质的锂二氧化碳电池的阴极。钌/碳纳米管阴极具有大表面积、最大放电容量、优异的可逆性以及低过电位下的长循环寿命。该电催化剂对二氧化碳还原反应和二氧化碳析出反应具有改善的电催化性能，这与可用的活性位点有关。使用钌/碳纳米管阴极，固态锂二氧化碳电池在100 mA g的电流供应和500 mA h g的截止容量下，与碳纳米管阴极（最大放电容量为1828 mA h g、25次循环以及1.64 V的电压间隙）相比，展现出4541 mA h g的最大放电容量和45次电池循环寿命，电压间隙为1.24 V。固态锂二氧化碳电池在未来储能方面已显示出有前景的潜在应用。
