Fundamental Understanding of Lignin Transformation into Graphene via Direct Laser Writing for Energy Storage

通过直接激光写入能量存储将木质素转化为石墨烯的基本理解

• 批准号: 1933861
• 负责人: Caixia Wan
• 金额: $ 40.3万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1933861&HistoricalAwards=false
• 关键词: Fundamental; Understanding; Lignin; Transformation; into

Direct laser writing (DLW) is an unconventional technique for producing porous graphene from variouscarbon precursors using a laser as an energy source. Biomass with higher lignin content appears to be a suitable feedstock for graphene formation by DLW, but the underlying mechanisms of lignin production from biomass for laser-induced graphene (LIG) production are not well understood. Furthermore, the mechanisms involved in lignin conversion into graphene under laser-induced reaction conditions also remain unclear. The proposed research aims to develop fundamental understanding of lignin transformation into graphene via DLW and develop a new process for upgrading waste lignin produced by paper mills and biorefineries into porous graphene for energy storage applications. The proposed research will investigate how lignin chemistry and structure affect LIG properties in terms of porosity, composition and degree of graphitization. Photothermal and photochemical effects of lignin-laser interactions will be studied to identify key laser parameters (e.g., power, scanning speed, image density) governing LIG properties. Transient chemical and physical processes of lignin-to-LIG will be studied at the atomic level by reactive force field molecular dynamics (ReaxFF MD) simulations. The lignin-derived LIG will be explored as active electrode material for supercapacitors. The project will train graduate and undergraduate students in research, with a focus on recruiting members of underrepresented and minority groups to join the research team. A new upper level undergraduate/graduate course will be developed based on the knowledge generated from the proposed research. There is also a plan for developing teaching modules for K-12 students to stimulate their interest into pursuing STEM careers.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

直接激光写入（DLW）是一种利用激光作为能量源，从各种碳前体生产多孔石墨烯的非常规技术。具有较高木质素含量的生物质似乎是DLW形成石墨烯的合适原料，但从生物质中产生木质素用于激光诱导石墨烯（LIG）生产的潜在机制尚不清楚。此外，在激光诱导反应条件下木质素转化为石墨烯的机制也尚不清楚。提出的研究旨在通过DLW对木质素转化为石墨烯的基本理解，并开发一种新工艺，将造纸厂和生物炼制厂生产的废木质素转化为多孔石墨烯，用于储能应用。该研究将探讨木质素的化学和结构如何影响LIG在孔隙度、组成和石墨化程度方面的性能。将研究木质素-激光相互作用的光热和光化学效应，以确定控制LIG性质的关键激光参数（例如功率，扫描速度，图像密度）。通过反应力场分子动力学（ReaxFF MD）模拟，在原子水平上研究木质素转化为lig的瞬态化学和物理过程。木质素衍生LIG将作为超级电容器的活性电极材料进行探索。该项目将对研究生和本科生进行研究培训，重点是招募代表性不足和少数群体的成员加入研究团队。一个新的更高水平的本科/研究生课程将根据从拟议的研究产生的知识开发。还有一项计划是为K-12学生开发教学模块，以激发他们追求STEM职业的兴趣。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Direct Freeform Laser Fabrication of 3D Conformable Electronics

• DOI: 10.1002/adfm.202210084
• 发表时间: 2022-10
• 期刊: Advanced Functional Materials
• 影响因子: 19
• 作者: Bujingda Zheng;Ganggang Zhao;Zheng Yan;Yunchao Xie;Jian Lin

Inverse design of two-dimensional graphene/h-BN hybrids by a regressional and conditional GAN

• DOI: 10.1016/j.carbon.2020.07.013
• 发表时间: 2020-11-01
• 期刊: CARBON
• 影响因子: 10.9
• 作者: Dong, Yuan;Li, Dawei;Lin, Jian
• 通讯作者: Lin, Jian

Insights into Structural Changes of Lignin toward Tailored Properties during Deep Eutectic Solvent Pretreatment

• DOI: 10.1021/acssuschemeng.0c01361
• 发表时间: 2020-07-06
• 期刊: ACS SUSTAINABLE CHEMISTRY & ENGINEERING
• 影响因子: 8.4
• 作者: Chen, Zhu;Bai, Xianglan;Wan, Caixia
• 通讯作者: Wan, Caixia

Rapid Identification of X-ray Diffraction Patterns Based on Very Limited Data by Interpretable Convolutional Neural Networks

• DOI: 10.1021/acs.jcim.0c00020
• 发表时间: 2020-03
• 期刊: Journal of chemical information and modeling
• 影响因子: 5.6
• 作者: Hong Wang;Yunchao Xie;Dawei Li;Heng Deng;Yun-Zhi Zhao;Ming Xin;Jian Lin

Laser-Induced Graphene Derived from Kraft Lignin for Flexible Supercapacitors

• DOI: 10.1021/acsomega.0c01293
• 发表时间: 2020-06-23
• 期刊: ACS OMEGA
• 影响因子: 4.1
• 作者: Mahmood, Faisal;Zhang, Hanwen;Wan, Caixia
• 通讯作者: Wan, Caixia