Gong Zhe, Wang Pengfei, Ye Ke, Zhu Kai, Yan Jun, Wang Guiling, Chen Guohua, Cao Dianxue
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, P.R. China.
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, P.R. China; Key Laboratory of Polymer and Catalyst Synthesis Technology of Liaoning Province, School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, P.R. China.
J Colloid Interface Sci. 2022 Nov;625:700-710. doi: 10.1016/j.jcis.2022.05.157. Epub 2022 May 31.
Rechargeable metal batteries such as non-aqueous Li metal batteries and aqueous Zn metal batteries have received increasing attention due to the benefits of the high-energy metal anode. However, the dendric growth on the metal anode extremely leads to restricted cycling performance and potential safety issues. Herein, the MXene-modified conductive framework (MCF) is designed and fabricated as a universal current collector of anode for non-aqueous Li metal batteries and aqueous Zn metal batteries to suppress the dendric Li and Zn growth. The MCF exhibits the merits of good lithiophilicity and zincophilicity, enables an easy Li/Zn nucleation process, and possesses high plating/stripping reversibility. After plating Li/Zn, MCF@Li and MCF@Zn realize a dendrite-free surface, facilitating Li/Zn plating/stripping kinetics. The MCF@Li and MCF@Zn symmetric cell shows a low overpotential of 13 mV at 1 mA cm after 900 cycles and 64 mV at 5 mA cm after 750 cycles (1 mAh cm), respectively. Furthermore, the non-aqueous MCF@Li||LiFePO full cells and the aqueous MCF@Zn||active carbon capacitors are assembled and present stable cycling ability and improved rate performance with low polarization. This work provides a universal current collector strategy to meet the requirements of non-aqueous and aqueous metal anodes, which may inspire more designs for metal-based energy storage systems.
诸如非水锂金属电池和水系锌金属电池等可充电金属电池，由于高能金属阳极的优势而受到越来越多的关注。然而，金属阳极上的枝晶生长极大地导致循环性能受限和潜在的安全问题。在此，设计并制备了MXene修饰的导电框架（MCF），作为非水锂金属电池和水系锌金属电池阳极的通用集流体，以抑制锂和锌枝晶的生长。MCF具有良好的亲锂性和亲锌性，能实现轻松的锂/锌成核过程，并具有高的电镀/脱镀可逆性。在镀锂/锌后，MCF@Li和MCF@Zn实现了无枝晶表面，促进了锂/锌电镀/脱镀动力学。MCF@Li和MCF@Zn对称电池在900次循环后，在1 mA cm时的过电位低至13 mV，在750次循环（1 mAh cm）后，在5 mA cm时的过电位为64 mV。此外，组装了非水MCF@Li||LiFePO全电池和水系MCF@Zn||活性炭电容器，它们具有稳定的循环能力和改善的倍率性能，且极化较低。这项工作提供了一种通用的集流体策略，以满足非水和水系金属阳极的要求，这可能会激发更多基于金属的储能系统的设计。
