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Guo J, Liu Y, Shan G, Li H, Li W, Qin H, Xia J, Wu J, Zhang J. The structure-effect relationship between inline high shear mixers and micromixing: Experiment and CFD simulation. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Qian Y, Wu Y, Gu F, Zhou Z, Huang Z, Tang X, Pan S, Zhang S, Chen S, Zhang Q, Chen Y, Wang S. Controllable and Scale-Up Synthesis of Nickel-Cobalt Boride@Borate/RGO Nanoflakes via Reactive Impingement Mixing: A High-Performance Supercapacitor Electrode and Electrocatalyst. Front Chem 2022; 10:874675. [PMID: 35494639 PMCID: PMC9039022 DOI: 10.3389/fchem.2022.874675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 03/24/2022] [Indexed: 11/13/2022] Open
Abstract
Large-scale synthesis of graphene-based nanomaterials in stirred tank reactor (STR) often results in serious agglomeration because of the poor control during micromixing process. In this work, reactive impingement mixing is conducted in a two-stage impinging jet microreactor (TS-IJMR) for the controllable and scale-up synthesis of nickel-cobalt boride@borate core-shell nanostructures on RGO flakes (NCBO/RGO). Benefiting from the good process control and improved micromixing efficiency of TS-IJMR, NCBO/RGO nanosheet provides a large BET surface area, abundant of suitable mesopores (2–5 nm), fast ion diffusion, and facile electron transfer within the whole electrode. Therefore, NCBO/RGO electrode exhibits a high specific capacitance of 2383 F g−1 at 1 A g−1, and still retains 1650 F g−1 when the current density is increased to 20 A g−1, much higher than those of nickel boride@borate/RGO (NBO/RGO) and cobalt boride@borate/RGO (CBO/RGO) synthesized in TS-IJMR, as well as NCBO/RGO-S synthesized in STR. In addition, an asymmetric supercapacitor (NCBO/RGO//AC) is constructed with NCBO/RGO and activated carbon (AC), which displays a high energy density of 53.3 W h kg−1 and long cyclic lifespan with 91.8% capacitance retention after 5000 charge-discharge cycles. Finally, NCBO/RGO is used as OER electrocatalyst to possess a low overpotential of 309 mV at a current density of 10 mA cm−2 and delivers a good long-term durability for 10 h. This study opens up the potential of controllable and scale-up synthesis of NCBO/RGO nanosheets for high-performance supercapacitor electrode materials and OER catalysts.
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Affiliation(s)
- Yudan Qian
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Yechao Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Fan Gu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Zhiming Zhou
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Zaimei Huang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Xinyue Tang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Shuang Pan
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Shangcong Zhang
- Low Voltage Apparatus Technology Research Center of Zhejiang, Wenzhou University, Wenzhou, China
- Technology Institute of Wenzhou University in Yueqing, Wenzhou, China
- *Correspondence: Shangcong Zhang, ; Qingcheng Zhang, ; Yihuang Chen,
| | - Shinan Chen
- Zhejiang Zheneng Wenzhou Electric Power Generation Co., Ltd., Wenzhou, China
| | - Qingcheng Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
- *Correspondence: Shangcong Zhang, ; Qingcheng Zhang, ; Yihuang Chen,
| | - Yihuang Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
- *Correspondence: Shangcong Zhang, ; Qingcheng Zhang, ; Yihuang Chen,
| | - Shun Wang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
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Cheng KP, Gu RJ, Wen LX. Application of a clustered countercurrent-flow micro-channel reactor in the preparation of KMnF3 perovskite for asymmetric supercapacitors. RSC Adv 2020; 10:11681-11693. [PMID: 35496586 PMCID: PMC9052370 DOI: 10.1039/d0ra01411g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 03/14/2020] [Indexed: 11/21/2022] Open
Abstract
KMnF3 ultrafine particles were prepared for supercapacitors by novel microreactors with intensified micromixing efficiency and a weak amplification effect.
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Affiliation(s)
- Kun-Peng Cheng
- Research Center of the Ministry of Education for High Gravity Engineering and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Chemical Engineering
| | - Ren-Jie Gu
- Research Center of the Ministry of Education for High Gravity Engineering and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Chemical Engineering
| | - Li-Xiong Wen
- Research Center of the Ministry of Education for High Gravity Engineering and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Chemical Engineering
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