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Song J, Huang L, Yang G, Liu T, Liu S, Cong G, Huang Y, Liu Z, Gao X, Geng L. Regulating Grind-Induced Lattice Distortion for Nickel-Rich Cathodes by Annealing. Small Methods 2024; 8:e2301400. [PMID: 38009762 DOI: 10.1002/smtd.202301400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Indexed: 11/29/2023]
Abstract
The commercialization of high-performance nickel-rich cathodes always awaits a cost-effective, environmentally friendly, and large-scale preparation method. Despite a grinding process normally adopted in the synthesis of the nickel-rich cathodes, lattice distortion, rough surface, and sharp edge transformation inevitably occurr in the resultant samples. In this work, an additional annealing process is proposed that aims at regulating lattice distortion as well as achieving round and smoother morphologies without any structural or elemental modifications. Such a structural enhancement is favored for improved lithium diffusion and electrochemical stability during cycling. Consequently, the annealed cathodes demonstrate a considerable enhancement in capacity retention, escalating from 68.7% to 91.9% after 100 cycles at 1 C. Additionally, the specific capacity is significantly increased from 64 to 142 mAh g-1 at 5 C when compared to the unannealed cathodes. This work offers a straightforward and effective approach for reinforcing the electrochemical properties of nickel-rich cathodes.
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Affiliation(s)
- Jinpeng Song
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Lujun Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
- Stake Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Guobo Yang
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Tiefeng Liu
- College of Chemical and Biological Engineering, Zhejiang University, Zhejiang, 310058, P. R. China
| | - Shaoshuai Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Guanghui Cong
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Yating Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Zheyuan Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
| | - Xiang Gao
- Center for High Pressure Science & Technology Advanced Research, Beijing, 100193, P. R. China
| | - Lin Geng
- School of Materials Science and Engineering, Harbin Institute of Technology, BOX 433, Harbin, 150001, P. R. China
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Ju B, Zhu Y, Yang W, Sun J, Li H, Yuan F, Xiu Z. Effect of Defects and Oxidation on CNT-Copper Interface: First-Principles Calculation and Experiment. Materials (Basel) 2023; 16:6845. [PMID: 37959442 PMCID: PMC10649970 DOI: 10.3390/ma16216845] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023]
Abstract
In this paper, the effects of carbon nanotube defects and a copper surface oxide layer on a carbon nanotube-copper interface were studied via first-principles. A defect-free CNT-Cu interface, Stone-Wales defect CNT-Cu interface, single-hole and double-hole defect CNT-Cu interface, and Cu2O-Cu interface were simulated and calculated. By simulating the differential charge density, atomic population, bond population and density of states of the interface model, the effects of various defects on the interface bonding and electrical conductivity of the composites during the preparation of the CNT-reinforced copper matrix composites were analyzed, which provided theoretical guidance for the preparation of CNT/Cu composites. After that, copper matrix composites with different CNT defect contents were prepared via different rolling deformation processes. Their hardness and electrical conductivity were tested, and the results were consistent with the results obtained via the first-principles calculations.
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Affiliation(s)
- Boyu Ju
- Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China; (B.J.); (W.Y.); (J.S.); (H.L.)
| | - Yubo Zhu
- Beijing Institute of Electronic Engineering, Beijing 100854, China;
| | - Wenshu Yang
- Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China; (B.J.); (W.Y.); (J.S.); (H.L.)
| | - Jinpeng Sun
- Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China; (B.J.); (W.Y.); (J.S.); (H.L.)
| | - Haozhe Li
- Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China; (B.J.); (W.Y.); (J.S.); (H.L.)
| | - Feng Yuan
- Department of Physical Education, China Agricultural University, Beijing 100083, China
| | - Ziyang Xiu
- Harbin Institute of Technology, School of Materials Science and Engineering, Harbin 150001, China; (B.J.); (W.Y.); (J.S.); (H.L.)
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Xiu Z, Ju B, Zhan J, Chen W, Yin A, Zhu X, Wang P, Wu P, Yang W. Study on the Preparation of Network Ti-N/Ti Composites by Nitridation of Ti Powders. Materials (Basel) 2023; 16:5259. [PMID: 37569962 PMCID: PMC10420182 DOI: 10.3390/ma16155259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/17/2023] [Accepted: 07/22/2023] [Indexed: 08/13/2023]
Abstract
Composite structure design is an important way to improve reinforcement strengthening efficiency. The dispersion of the external reinforcement is often not uniform enough, however, and it is agglomerated in the matrix, which cannot uniformly and effectively bear the load. The interconnected reinforcement network prepared by the in-situ self-growth method is expected to obtain higher material properties. In this paper, the TiN shell was formed on the surface of Ti powder by the in-situ nitriding method, and then the network TiN/Ti composites were prepared by sintering. In the control group, TiN was dispersed by mechanical ball milling, and it was found that TiN powder was coated on the surface of Ti particles, and the sintered TiN/Ti composites formed a discontinuous structure with a great deal of TiN agglomeration. A uniform TiN nitride layer of 5~7 μm was formed on the surface of Ti powder by the in-situ nitriding method, and a connected TiN network was formed in the sintered Ti-N/Ti composites. The composites prepared by nitriding have higher compressive strength, hardness, and plasticity. The hardness of the Ti-N/Ti composite is 685.7 HV and the compressive strength is 1468.5 MPa. On this basis, the influence of the connected TiN structure on the material properties was analyzed, which provided theoretical guidance for the structural design of the network structure-reinforced titanium matrix composites.
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Affiliation(s)
- Ziyang Xiu
- State Key Laboratory of Advanced Welding and Jointing, Harbin Institute of Technology, Harbin 150001, China;
| | - Boyu Ju
- State Key Laboratory of Advanced Welding and Jointing, Harbin Institute of Technology, Harbin 150001, China;
| | - Junhai Zhan
- Shanghai Aerospace System Engineering Research Institute, Shanghai 201108, China; (J.Z.); (W.C.); (A.Y.); (X.Z.)
| | - Weidi Chen
- Shanghai Aerospace System Engineering Research Institute, Shanghai 201108, China; (J.Z.); (W.C.); (A.Y.); (X.Z.)
| | - Aiping Yin
- Shanghai Aerospace System Engineering Research Institute, Shanghai 201108, China; (J.Z.); (W.C.); (A.Y.); (X.Z.)
| | - Xiaolin Zhu
- Shanghai Aerospace System Engineering Research Institute, Shanghai 201108, China; (J.Z.); (W.C.); (A.Y.); (X.Z.)
| | - Pengjun Wang
- Xian Honor Device Co., Ltd., Xi’an 710000, China;
| | - Ping Wu
- Key Laboratory of Advanced Science and Technology on High Power Microwave, Xi’an 710024, China;
- Northwest Institute of Nuclear Technology, Xi’an 710024, China
| | - Wenshu Yang
- State Key Laboratory of Advanced Welding and Jointing, Harbin Institute of Technology, Harbin 150001, China;
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