Insight into the decay mechanism of cycling capacitance for layered double hydroxides at subnanometer scale
Jie Zhao, Yue Guo, Yuqi Yang, Zhen Shen, Qiang Wu, Lijun Yang, Xizhang Wang, Zheng Hu
Abstract
The application of layered double hydroxides (LDHs) in supercapacitors is encouraged by their high capacitances but still limited by deficient cycling stability. The remarkable capacitance decay of LDHs during cycling mainly results from the narrowing of the interlayer distance due to the interlayer anion replacement. A polymer encapsulation strategy is developed to improve the cycling stability of LDHs by inhibiting the anion exchange, opening a new avenue to develop stable LDH-based supercapacitor materials.
Topics & Concepts
CapacitanceMechanism (biology)CyclingScale (ratio)Layered double hydroxidesMaterials scienceChemical physicsNanotechnologyChemical engineeringChemistryInorganic chemistryElectrodePhysicsPhysical chemistryHydroxideEngineeringHistoryQuantum mechanicsArchaeologyLayered Double Hydroxides Synthesis and ApplicationsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies