期刊
ACS NANO
卷 15, 期 4, 页码 6872-6885出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c10624
关键词
carbon dots; energy storage; potassium ion batteries; carbon materials; anode
类别
资金
- National Science Foundation of China [52074539, 51904342]
- Hunan Provincial Science and Technology Plan [2020JJ3048]
- Science and Technology Innovation Program of Hunan Province [2020RC4005, 2019RS1004]
- Fundamental Research Funds for Central Universities of the Central South University [2020zzts393]
- Innovation Mover Program of Central South University [2020CX007]
This study proposes a low-cost, high-efficiency method for the synthesis of carbon dots via aldol condensation, achieving functionalization with N-doping and NS double doping. Additionally, functionalized 1D carbon fibers for high-performance potassium storage anodes were designed, utilizing the controllable assembly of carbon dots induced by a Zn compound.
Carbon dot is a type of carbon material with an ultrasmall size of less than 10 nm for all three dimensions, which has attracted more and more attention due to its useful merits. Unfortunately, the complicated synthesis method and low yield largely limit its wide large-scale application. Herein, an inexpensive and high-efficiency aldol condensation method under ambient temperature and pressure was proposed for the large-scale synthesis of CDs, which can obtain products with 1.083 kg in 2 h and realize the functionalization of carbon dots doped with nitrogen (NCDs) and sulfur/nitrogen doubly (NSCDs), and then the mechanism and structure of CDs formation were explained. Moreover, utilizing the feature of controllable assembly of carbon dots, and combined with theoretical calculations, we have designed functionalized 1D carbon fibers (CF) to construct high-performance potassium storage anode materials through the assembly of carbon dots induced by a Zn compound. Benefitting from the microstructure and surface functional groups derived from CDs, the N-doped CF (NCF700) exhibits superior electrochemical energy storage performance for potassium ion batteries (PIBs). This study provides a low-cost and high-yield method to produce CDs and promotes the practical application of CDs in electrochemical energy storage.
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