3 research outputs found
Directly grown Sr-Co layered double hydroxide (LDH) entangled two dimensional nanosheet film with superior performances
Designing of electrode with electrochemically rich structure, outstanding mechanical robustness and high electrical conductivity remains a challenge. We report a design of entangled Sr-Co Layered double hydroxides (LDHs) two-dimensional structure for such electrode. The hierarchical electrode with entangled nanosheet exhibit high specific capacitance of 1415 F g(-1) at 5 A g(-1) current density, excellent rate capability, high energy (12.28Whkg(-1)) and power density (567.788 W kg(-1)) and outstanding stability (80% capacity retention over 5000 cycles). The asymmetric device cell of Sr-Co LDH/ACC gives high energy density (27.78 Whkg-1) and power density (499.96Wkg-1) with cyclic performance of 1000 cycles with 95.24% capacitance retention. Further, we provide a detailed analysis of the various electrolyte environment experienced by the electrode and their effect on electrochemical properties. We pick out three different electrolytes; LiOH, NaOH, KOH and show that both selected electrolyte and metal combination for LDHs paves the way for outstanding electrochemical performance