Functionalization of polyvinyl alcohol composite membrane by CoOOH for direct borohydride fuel cells

A new approach is proposed to evade the conductivity-permeability trade-off dilemma in the traditional anion exchange membrane. The CoOOH-functionalized membrane shows higher ionic conductivity and lower borohyrdride ion permeability than the membrane without CoOOH. The addition of CoSO4 in membrane results in good cell performances (a maximum power density of 144 mW·cm− 2 at 30 °C).251