Heo, Yeong Hoon Lee, Juyun Ha, Son Hyun, Jong Chan Kang, Dong Hyuk Yoon, Juhee Kim, Hyun Soo Choi, Yeonhua Kang, Yun Chan Jin, Hyoung-Joon Kim, Seon Joon Yun, Young Soo 2024-01-19T09:04:46Z 2024-01-19T09:04:46Z 2023-07-06 2023-07 2050-7488 https://pubs.kist.re.kr/handle/201004/113538 Multivalent Al metal anodes (AMAs) can deliver high specific/volumetric capacities (2980 mA h g(-1)/8046 mA h cm(-3)) in chloroaluminate ionic liquid-based electrolytes (ILEs). However, strong corrosion of their surfaces and poor charge transfer kinetics in acidic ILEs remain critical obstacles to realizing high-performance AMAs. In this study, a 3D-structured bifunctional MXene paper electrode (3D-BMPE), which has distinctive material properties, such as high electrical conductivity, high elastic modulus, a large number of nanopores, and multitudinous oxygen functional groups, was fabricated to protect Al deposition/dissolution reactions with improved redox kinetics. The 3D-BMPE obstructed Al corrosion during the long rest time in the ILE and consecutive cycling process, resulting in a significantly stable cycling performance of the 3D-BMPE-based AMA over 2000 cycles. Furthermore, Al nucleation and growth reactions were catalyzed in the nanoporous structure surrounded by the highly functionalized MXene surfaces, which reduced overpotentials by one-sixth, resulting in highly improved coulombic efficiencies of & SIM;99.9%. Moreover, the excellent electrochemical performance of the 3D-BMPE-based AMA was confirmed in Al-based dual-ion battery full cells, demonstrating the significant role played by 3D-BMPEs for AMAs. English Royal Society of Chemistry 3D-structured bifunctional MXene paper electrodes for protection and activation of Al metal anodes Article 10.1039/d3ta01840g 1 Journal of Materials Chemistry A, v.11, no.26, pp.14380 - 14389 Journal of Materials Chemistry A 11 26 14380 14389 N scie scopus 001011711900001 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article DENDRITE GROWTH ALUMINUM CARBON LAYER