  An urgent demand for new sustainable and efficient energy conversion and
storage devices required the development of novel electrode materials with
increased specific capacitance. However, low mass loading, poor scalability,
and low working voltage always limited further practical application of most
reported high-performance supercapacitors electrode materials. In this work, we
demonstrated the preparation of activated glassy carbon foam as
high-performance electrode via oxidizing commercial glassy carbon foam in HNO3
solution.
