Advances in biomass-derived carbon composites as electrode materials for supercapacitors

As electrode materials (EMs) for supercapacitors (SCs), biomass-derived carbon composites (BDCC) are frequently used because of their plentiful supply, renewable properties, affordable manufacturing prices, large specific surface area (SSA), and porous structure with straightforward synthesis methods. The performance of SCs can be extremely boosted by BDCC, which has a wide range of potential applications. This paper outlines the advances in synthesis methods and application of BDCC as EMs for SCs and introduces the characteristics of these methods. Thereafter, the advances in biomass-derived carbon combined with carbon nanotubes (CNTs), graphene, and conductive polymers as EMs and the peculiarities and electrochemical properties (SSA, energy density, cycle stability, specific capacitance), as well as some research achievements over the past few years are reviewed. Finally, the future orientations, challenges, and prospects of BDCC as EMs for SCs are discussed.