石墨烯
材料科学
剥脱关节
墨水池
纳米技术
石墨烯泡沫
氧化石墨烯纸
复合材料
作者
Yeongwon Kwak,Ho Young Jun,Gyuri Kim,Hye‐Jin Ahn,Wook Ryol Hwang,Gyeong Hee Ryu,Sang-Ouk Ryu,Se Hyun Kim,Boris Brigljević,Aleksey Ni,Hankwon Lim,Chang-Ho Choi
标识
DOI:10.1021/acs.iecr.3c00490
摘要
Achieving high efficiency in graphene production and printing process simultaneously is challenging, but it needs to be addressed as it is critical for realizing the commercial viability of printed graphene devices. This study successfully substantiates these requirements by significantly improving the efficiency of graphene production and subsequently developing an inkjet-printable graphene ink that enables the rapid formation of the percolation network of graphene flakes. The integration of a flow coil reactor into an ultrasonic bath results in scalable and rapid graphene production, with graphene productivity up to three orders of magnitude higher than conventional liquid-phase exfoliation (LPE), offering the potential that ultrasonic LPE can benefit the scalability and simplicity of graphene production. In addition, the graphene ink, optimized by ink formulation, has a stable high graphene concentration of 3.5 g L–1, resulting in the formation of stable percolation networks of graphene flakes only after two printing passes under optimized printing conditions. The printed graphene patterns are also confirmed to be conformable to various substrates and durable against repeated stretching and bending stress. By ensuring high efficiency in graphene production and inkjet-printable ink preparation, this study would promote the commercialization of graphene production and the resulting printed graphene devices.
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