A comprehensive green utilization strategy of lignocellulose from rice husk for the fabrication of high-rate electrochemical zinc ion capacitors

作者：Zhang, Wenli^*; Jian, Wenbin; Yin, Jian; Zhang, Xiaoshan; Wang, Caiwei; Lin, Xuliang; Qin, Yanlin; Lu, Ke; Lin, Haibo; Wang, Tiejun; Qiu, Xueqing^*

来源：JOURNAL OF CLEANER PRODUCTION, 2021, 327: 129522.

DOI：10.1016/j.jclepro.2021.129522

• Rice husk
• Lignin
• Cellulose
• Porous carbon
• Zinc ion capacitor

Rice husk is an important biomass residue derived from the production of rice. Rice husk contains silica (10-20 wt%) and lignocellulose (cellulose, 15-25 wt%; lignin, 10-20 wt%). The lignocellulose components in rice husk are potential carbon sources for functional carbon materials. In this work, we propose a general comprehensive green utilization strategy for the preparation of lignin-derived hierarchical porous carbon (LHPC) and cellulose-paper-based separator using the lignin and cellulose components inside rice husk, respectively. The obtained LHPC and cellulose paper separators were used as pivotal components for the fabrication of high-rate electrochemical zinc ion capacitors. Meanwhile, the silica and potassium sources in this comprehensive route were recycled as nano-sized SiO2 particles and pure KCl powders. This work constitutes a general route for the green utilization of rice husk biomass. This work opens a green avenue for the effective utilization of renewable bio-masses to develop functional carbon materials and pivotal components of electrochemical energy storage devices.

• 单位
  吉林大学; 广东工业大学