Halogen chlorine triggered oxygen vacancy-rich Ni(OH)2 with enhanced reaction kinetics for pseudocapacitive energy storage

Improved electrochemical performance of the FeOx(OH)/IF electrode via in situ surface modification with organic naphthoquinone molecules

“…The unavoidable multiphase changes and the unsatisfactory electronic conductivity of the Fe(OH) 2 intermediate cause the deformation and passivation of the electrode, thereby leading to poor electrochemical performance and cycling stability. 1–3 Therefore, the reported specific capacities of the iron-based anodes in previous works are still much lower than the theoretical capacity, together with their poor rate capability, cycling stability and charging/discharging efficiency. Based on this issue, a further improvement in the iron-based electrode materials is highly expected.…”

“…12 More recently, Hao et al designed a Ni-Fe full cell using the as-prepared FeOOH@rGO material as an anode, which shows excellent electrochemical storage properties. 13 Li et al also reported a high-performance Ni-Fe battery, in which the Fe-based anode material was synthesized by depositing Fe oxides on the 3D porous iron substrate via a hydrothermal method. 14 Elemental doping is also an effective method to enhance the electrochemical performance of iron-based electrode materials.…”