Lignin Laser Lithography: A Direct-Write Method for Fabricating 3D Graphene Electrodes for Microsupercapacitors

Wenli Zhang, Yongjiu Lei, Fangwang Ming, Qiu Jiang, Pedro M. F. J. Da Costa, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

171 Scopus citations


In this work, a simple lignin-based laser lithography technique is developed and used to fabricate on-chip microsupercapacitors (MSCs) using 3D graphene electrodes. Specifically, lignin films are transformed directly into 3D laser-scribed graphene (LSG) electrodes by a simple one-step CO2 laser irradiation. This step is followed by a water lift-off process to remove unexposed lignin, resulting in 3D graphene with the designed electrode patterns. The resulting LSG electrodes are hierarchically porous, electrically conductive (conductivity is up to 66.2 S cm−1), and have a high specific surface area (338.3 m2 g−1). These characteristics mean that such electrodes can be used directly as MSC electrodes without the need for binders and current collectors. The MSCs fabricated using lignin laser lithography exhibit good electrochemical performances, namely, high areal capacitance (25.1 mF cm−2), high volumetric energy density (≈1 mWh cm−3), and high volumetric power density (≈2 W cm−3). The versatility of lignin laser lithography opens up the opportunity in applications such as on-chip microsupercapacitors, sensors, and flexible electronics at large-scale production.
Original languageEnglish (US)
Pages (from-to)1801840
JournalAdvanced Energy Materials
Issue number27
StatePublished - Aug 9 2018


Dive into the research topics of 'Lignin Laser Lithography: A Direct-Write Method for Fabricating 3D Graphene Electrodes for Microsupercapacitors'. Together they form a unique fingerprint.

Cite this