Ultrafast Shaped Laser Induced Synthesis of MXene Quantum Dots/Graphene for Transparent Supercapacitors

Yongjiu Yuan; Lan Jiang; Xin Li; Pei Zuo; Xueqiang Zhang; Yiling Lian; Yunlong Ma; Misheng Liang; Yang Zhao; Liangti Qu

doi:10.1002/adma.202110013

Ultrafast Shaped Laser Induced Synthesis of MXene Quantum Dots/Graphene for Transparent Supercapacitors

Adv Mater. 2022 Mar;34(12):e2110013. doi: 10.1002/adma.202110013. Epub 2022 Feb 10.

Authors

Yongjiu Yuan^{1

2

3}, Lan Jiang^{1

2

3}, Xin Li^{1

2

3}, Pei Zuo^{1

2

3}, Xueqiang Zhang^{1

2

3}, Yiling Lian^{1

2

3}, Yunlong Ma^{1

2

3}, Misheng Liang^{1

2

3}, Yang Zhao⁴, Liangti Qu⁵

Affiliations

¹ Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 10081, P. R. China.
² Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, 314000, P. R. China.
³ Beijing Institute of Technology Chongqing Innovation Center, Chongqing, 401120, P. R. China.
⁴ Key Laboratory of Cluster Science Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, P. R. China.
⁵ MOE Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.

PMID: 35072957
DOI: 10.1002/adma.202110013

Abstract

Ultratransparent electrodes have attracted considerable attention in optoelectronics and energy technology. However, balancing energy storage capability and transparency remains challenging. Herein, an in situ strategy employing a temporally and spatially shaped femtosecond laser is reported for photochemically synthesizing of MXene quantum dots (MQDs) uniformly attached to laser reduced graphene oxide (LRGO) with exceptional electrochemical capacitance and ultrahigh transparency. The mechanism and plasma dynamics of the synthesis process are analyzed and observed at the same time. The unique MQDs loaded on LRGO greatly improve the specific surface area of the electrode due to the nanoscale size and additional edge states. The MQD/LRGO supercapacitor has high flexibility and durability, ultrahigh energy density (2.04 × 10^-3 mWh cm^-2 ), long cycle life (97.6% after 12 000 cycles), and excellent capacitance (10.42 mF cm^-2 ) with both high transparency (transmittance over 90%) and high performance. Furthermore, this method provides a means of preparing nanostructured composite electrode materials and exploiting quantum capacitance effects for energy storage.

Keywords: MXenes; energy storage; graphene; quantum dots; shaped femtosecond laser.

Abstract

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