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Gang H, Deng H, Yan L, Wu B, Alhassan SI, Cao Y, Wei D, Wang H. Surface redox pseudocapacitance boosting Fe/Fe 3C nanoparticles-encapsulated N-doped graphene-like carbon for high-performance capacitive deionization. J Colloid Interface Sci 2023; 638:252-262. [PMID: 36738548 DOI: 10.1016/j.jcis.2023.01.093] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 01/14/2023] [Accepted: 01/20/2023] [Indexed: 01/25/2023]
Abstract
The practical application of carbon anode in capacitive deionization (CDI) is greatly hindered by their poor adsorption capacity and co-ion effect. Herein, an N-doped graphene-like carbon (NC) decorated with Fe/Fe3C nanoparticles composite (Fe/Fe3C@NC) with large specific surface area and plentiful porosity is fabricated via a facile and scalable method, namely sol-gel method combined with Fe-catalyzed carbonization. As expected, it exhibits superior CDI performance as a Cl-storage electrode, with Cl- adsorption capacity as high as 102.3 mg g-1 at 1000 mg L-1 Cl- concentration and 1.4 V voltage, and a stable capacity of 68.5 mg g-1 for 60 cycles in 500 mg L-1 Cl- concentration and 100 mA g-1 current density. More importantly, on the basis of electrochemical tests, ex-situ X-ray diffraction, ex-situ X-ray photoelectron spectroscopy (XPS), and XPS analysis with argon ion depth etching, it is revealed that the chlorine storage mechanism of the Fe/Fe3C@NC electrode is dominated by the surface-related redox pseudocapacitance behavior of Fe2+/Fe3+ couple occurring on or near the surface, enabling fast and reversible ion storage. This work proposes an economical and environmentally friendly general method for the design and development of high-performance Cl-storage electrodes for CDI, and offers an in-depth insight into the Cl- storage mechanism of Fe decorated carbon electrodes, further promoting the development of CDI technology.
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Affiliation(s)
- Haiyin Gang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Haoyu Deng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Lvji Yan
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Bichao Wu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Sikpaam Issaka Alhassan
- College of Engineering, Chemical and Environmental Engineering Department, University of Arizona, Tucson, USA
| | - Yiyun Cao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Dun Wei
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Haiying Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha 410083, China.
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Core-shell structured Fe2P@TiO2/CNF anode nanocomposite fibers for efficient lithium/sodium-ion storage. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gao P, Shi H, Ma T, Liang S, Xia Y, Xu Z, Wang S, Min C, Liu L. MXene/TiO 2 Heterostructure-Decorated Hard Carbon with Stable Ti-O-C Bonding for Enhanced Sodium-Ion Storage. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51028-51038. [PMID: 34672200 DOI: 10.1021/acsami.1c15539] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Hard carbon (HC) has attracted considerable attention in the application of sodium-ion battery (SIB) anodes, but the poor realistic capacity and low rate performance severely hinder their practical application. Herein we report a solvent mechanochemical protocol for the in situ fabrication of the HC-MXene/TiO2 electrode by functionalizing MXene to improve the electrochemical performance of the batteries. MXene (Ti3C2Tx) with abundant oxygen-containing functional groups reacts with HC particles in the ball milling process to form a Ti-O-C covalent cross-linked HC-MXene composite, in which the edge of the MXene nanosheets is in situ oxidized by air to form TiO2 nanorods, forming a regular 1D/2D MXene/TiO2 heterojunction structure. Ti-O-C covalent bonding can protect the heterojunction structures from pulverization and detachment from the current collector during charge/discharge cycles due to sodium-ion intercalation/detachment, thus improving the stability of the electrode structure. Meanwhile, the MXene/TiO2 heterojunction can form a 3D conductive network and provide more active sites. The resulting HC-MXene/TiO2 electrode exhibits superior electrode capacity (660 mAh g-1), making it a promising anode material for SIBs. This simple and efficient method for preparing MXene/TiO2 heterojunction-decorated HC provides a new perspective on the structural design of MXene and carbon material composites for SIBs.
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Affiliation(s)
- Pan Gao
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Haiting Shi
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Tianshuai Ma
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Shuaitong Liang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Yuanhua Xia
- Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China
| | - Zhiwei Xu
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Shuo Wang
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
| | - Chunying Min
- Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Liyan Liu
- Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, China
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