Developing a simple and effective high-performance all-solid-state graphene-based mircosupercapacitor (MSC) by using biomass wastes as raw materials has attracted excellent interest. Here we report a scalable approach for producing sulfur-doped porous three-dimensional (3D) graphene materials from lignin and polyethersulfone (PES) films by using a facile laser direct writing (LDW) technique. In the lignin-PES (L-P) film, lignin, a waste by-product generated in paper industry, was served as a sustainable and economic carbon source, while PES was employed as a sulfur source and adhesive. The lignin-PES film can be transformed into sulfur-doped laser-induced graphene (LIG) by scribing under CO₂ laser in ambient condition. Furthermore, the MSCs were fabricated directly using two L-P LIG electrodes as electrode materials, and H₂SO₄/PVA gel as electrolyte. The results indicate L-P LIG MSCs exhibit excellent electrochemical performances, namely, high areal capacitance (22 mF cm⁻²), superhigh areal energy density of 1.53 mwh cm⁻² at the areal power density of 25.4 mw cm⁻², which outperform many LIG-based supercapacitors. The concept of designing MSCs obtained with a simple laser-induced technology can inspire both the building MSCs, preparation of graphene, and the sustainable application of lignin.

以生物质废弃物为原料开发一种简单有效的高性能全固态石墨烯基超级电容器（MSC）引起了人们的极大兴趣。在这里，我们报告了一种可扩展的方法，该方法通过使用简便的激光直接写入（LDW）技术从木质素和聚醚砜（PES）薄膜生产硫掺杂的多孔三维（3D）石墨烯材料。在木质素-PES（LP）膜中，木质素是造纸工业产生的废物副产物，可作为可持续和经济的碳源，而PES则用作硫源和粘合剂。木质素-PES膜可通过在CO ₂下划线而转化为掺杂硫的激光诱导的石墨烯（LIG）激光在环境条件下。此外，直接使用两个LP LIG电极作为电极材料，并使用H ₂ SO ₄ / PVA凝胶作为电解质直接制造MSC 。结果表明LP LIG的MSCs表现出优异的电化学性能，即，高的面电容（22μF的厘米^-2），1.53兆瓦时厘米超高面能量密度^-2在25.4毫瓦厘米的面功率密度^-2，这优于许多LIG型超级电容器。设计采用简单激光诱导技术获得的MSC的概念可以启发建造MSC，石墨烯的制备以及木质素的可持续应用。