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Man Y, Nan H, Ma J, Li Z, Zhou J, Wang X, Li H, Xue C, Yang Y. Functionalized γ-Boehmite Covalent Grafting Modified Polyethylene for Lithium-Ion Battery Separator. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2162. [PMID: 38730969 PMCID: PMC11085248 DOI: 10.3390/ma17092162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 04/23/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024]
Abstract
In the field of lithium-ion batteries, the challenges posed by the low melting point and inadequate wettability of conventional polyolefin separators have increased the focus on ceramic-coated separators. This study introduces a highly efficient and stable boehmite/polydopamine/polyethylene (AlOOH-PDA-PE) separator. It is crafted by covalently attaching functionalized nanosized boehmite (γ-AlOOH) whiskers onto polyethylene (PE) surfaces. The presence of a covalent bond increases the stability at the interface, while amino groups on the surface of the separator enhance the infiltration of the electrolyte and facilitate the diffusion of lithium ions. The PE-PDA-AlOOH separator, when used in lithium-ion batteries, achieves a discharge capacity of 126 mAh g-1 at 5 C and retains 97.1% capacity after 400 cycles, indicating superior cycling stability due to its covalently bonded ceramic surface. Thus, covalent interface modification is a promising strategy to prevent delamination of ceramic coatings in separators.
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Affiliation(s)
- Yuanxin Man
- Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China; (Y.M.); (H.N.); (J.M.); (Z.L.)
| | - Hui Nan
- Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China; (Y.M.); (H.N.); (J.M.); (Z.L.)
| | - Jianzhe Ma
- Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China; (Y.M.); (H.N.); (J.M.); (Z.L.)
| | - Zhike Li
- Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China; (Y.M.); (H.N.); (J.M.); (Z.L.)
| | - Jingyuan Zhou
- Qinghai Beijie New Material Technology Co., Ltd., Xining 810016, China; (J.Z.); (X.W.)
| | - Xianlan Wang
- Qinghai Beijie New Material Technology Co., Ltd., Xining 810016, China; (J.Z.); (X.W.)
| | - Heqi Li
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China;
| | - Caihong Xue
- Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China; (Y.M.); (H.N.); (J.M.); (Z.L.)
| | - Yongchun Yang
- Qinghai Institute of Science and Technology Information Co., Ltd., Xining 810016, China
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Thang AQ, Shen Y, Shi Z, Yao G, Wong SY, Liu Z, Yan Q. Partially Neutralized Polyacrylic Acid as an Efficient Binder for Aqueous Ceramic-Coated Separators for Lithium-Ion Batteries. Chem Asian J 2023; 18:e202300538. [PMID: 37544905 DOI: 10.1002/asia.202300538] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/02/2023] [Accepted: 08/02/2023] [Indexed: 08/08/2023]
Abstract
A partially neutralized polyacrylic acid (Pn-PAA) is used for coating sub-micron-sized α-alumina on a conventional microporous polyolefin separator, fabricating a ceramic-coated separator (CCS). Pn-PAA acts as a dispersant and binder by adsorbing itself on alpha(α)-alumina surfaces under acidic condition through the columbic interaction, providing a repulsive force to disperse fine alumina in aqueous suspension, and binds alumina strongly on plasma-treated separator through hydrogen bonding. This CCS shows favorable wettability in carbonate-based liquid electrolyte and ionic conduction due to the high hydrophilicity of Pn-PAA and alumina. With that, this study found that Pn-PAA-made-CCS yields a substantial adhesion strength of ~106 N/m with enhanced cycle stability, a specific capacity of 145.0 mAh/g after 200 cycles at 1 C at room temperature in half cells (LFP/Li metal).
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Affiliation(s)
- Ai Qin Thang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore
| | - Yuejun Shen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zugui Shi
- Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore
| | - Ge Yao
- Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore
| | - Sun Yew Wong
- Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore
| | - Zhaolin Liu
- Institute of Materials Research and Engineering, Agency for Science, Technology, and Research (A*STAR), 2 Fusionpolis Wa, Innovis, #08-03, Singapore, 138634, Singapore
| | - Qingyu Yan
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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Enhancement of Li+ ion kinetics in boehmite nanofiber coated polypropylene separator in LiFePO4 cells. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Effects of Coated Separator Surface Morphology on Electrolyte Interfacial Wettability and Corresponding Li-Ion Battery Performance. Polymers (Basel) 2020; 12:polym12010117. [PMID: 31948029 PMCID: PMC7022756 DOI: 10.3390/polym12010117] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/08/2019] [Accepted: 12/16/2019] [Indexed: 11/16/2022] Open
Abstract
In order to study the effect of interfacial wettability of separator on electrochemical properties for lithium-ion batteries, two different kinds of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) solution are prepared and used to coat onto a polypropylene (PP) microporous membrane. It is found that the cell performance of a coated separator using aqueous slurry (WPS) is better than that of the coated separator using acetone (APS) as the solvent. The separator with flat and pyknotic surface (PP and APS) has a strong polar action with the electrolyte, where the polar part is more than 80%. To the contrary, the WPS has a roughness surface and when the PVDF-HFP particles accumulate loose, it makes the apolar part plays a dominate role in surface free energy; the dispersive energy reaches to 40.17 mJ m-2. The WPS has the lowest immersion free energy, 31.9 mJ m-2 with the electrolyte, and this will accelerate electrolyte infiltration to the separator. The loose particle accumulation also increases the electrolyte weight uptake and interfacial wettability velocity, which plays a crucial role in improving the cell performance such as the ionic conductivity, discharge capacity and the C-rate capability.
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Li X, Chen S, Xia Z, Li L, Yuan W. High performance of boehmite/polyacrylonitrile composite nanofiber membrane for polymer lithium-ion battery. RSC Adv 2020; 10:27492-27501. [PMID: 35516970 PMCID: PMC9055623 DOI: 10.1039/d0ra02401e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 07/10/2020] [Indexed: 02/04/2023] Open
Abstract
In this study, a novel boehmite/polyacrylonitrile (BM/PAN) composite nanofiber membrane was prepared using the electrospinning technique. The physical and electrochemical properties of different contents of BM/PAN composite nanofiber membranes were investigated as separators for lithium ion batteries (LIBs). Compared to the commercial polypropylene (PP) separator, the experimental results show that the BM/PAN composite nanofiber separator possesses a unique three-dimensional (3D) interconnected structure and exhibits higher porosity, greater electrolyte up-take, higher thermal stability and better electrochemical performance in a LiCoO2/Li cell. Besides, batteries containing 30 wt% BM/PAN membranes display the highest ionic conductivity (2.85 mS cm−1), widest electrochemical stability window (5.5 V vs. Li+/Li), leading to the highest initial discharge capacity (162 mA h g−1) and the largest capacity retention ratio (90.7%) at 0.5C after 100 cycles. These findings reveal that the BM/PAN composite nanofiber membranes are promising candidates as commercial separators for high performance LIBs. In this study, a novel boehmite/polyacrylonitrile (BM/PAN) composite nanofiber membrane was prepared using the electrospinning technique.![]()
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Affiliation(s)
- Xiang Li
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
- SCUT-Zhuhai Institute of Modern Industrial Innovation
| | - Shilin Chen
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Zilong Xia
- Xiangyang Cigarette Factory
- China Tobacco Hubei Industrial Co., Ltd
- China
| | - Li Li
- College of Environmental Science and Engineering
- South China University of Technology
- Guangzhou 510006
- P. R. China
| | - Wenhui Yuan
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
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NH 3-Sensing Mechanism Using Surface Acoustic Wave Sensor with AlO(OH) Film. NANOMATERIALS 2019; 9:nano9121732. [PMID: 31817223 PMCID: PMC6955815 DOI: 10.3390/nano9121732] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/24/2019] [Accepted: 12/01/2019] [Indexed: 02/06/2023]
Abstract
In this study, AlO(OH) (boehmite) film was deposited onto a surface acoustic wave (SAW) resonator using a combined sol-gel and spin-coating technology, and prepared and used as a sensitive layer for a high-performance ammonia sensor. The prepared AlO(OH) film has a mesoporous structure and a good affinity to NH3 (ammonia gas) molecules, and thus can selectively adsorb and react with NH3. When exposed to ammonia gases, the SAW sensor shows an initial positive response of the frequency shift, and then a slight decrease of the frequency responses. The sensing mechanism of the NH3 sensor is based on the competition between mass-loading and elastic-loading effects. The sensor operated at room temperature shows a positive response of 1540 Hz to 10 ppm NH3, with excellent sensitivity, selectivity and stability.
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Wang Y, Yin C, Song Z, Wang Q, Lan Y, Luo J, Bo L, Yue Z, Sun F, Li X. Application of PVDF Organic Particles Coating on Polyethylene Separator for Lithium Ion Batteries. MATERIALS 2019; 12:ma12193125. [PMID: 31557824 PMCID: PMC6804153 DOI: 10.3390/ma12193125] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/17/2019] [Accepted: 09/23/2019] [Indexed: 11/16/2022]
Abstract
Surface coating modification on a polyethylene separator serves as a promising way to meet the high requirements of thermal dimensional stability and excellent electrolyte wettability for lithium ion batteries (LIBs). In this paper, we report a new type of surface modified separator by coating polyvinylidene fluoride (PVDF) organic particles on traditional microporous polyethylene (PE) separators. The PE separator coated by PVDF particles (PE-PVDF separator) has higher porosity (61.4%), better electrolyte wettability (the contact angle to water was 3.28° ± 0.21°) and superior ionic conductivity (1.53 mS/cm) compared with the bare PE separator (51.2%, 111.3° ± 0.12°, 0.55 mS/cm). On one hand, the PVDF organic polymer has excellent organic electrolyte compatibility. On the other hand, the PVDF particles contain sub-micro spheres, of which the separator can possess a large specific surface area to absorb additional electrolyte. As a result, LIBs assembled using the PE-PVDF separator showed better electrochemical performances. For example, the button cell using a PE-PVDF as the separator had a higher capacity retention rate (70.01% capacity retention after 200 cycles at 0.5 C) than the bare PE separator (62.5% capacity retention after 200 cycles at 0.5 C). Moreover, the rate capability of LIBs was greatly improved as well—especially at larger current densities such as 2 C and 5 C.
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Affiliation(s)
- Yuan Wang
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Chuanqiang Yin
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Zhenglin Song
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Qiulin Wang
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Yu Lan
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Jinpeng Luo
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Liwen Bo
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Zhihao Yue
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Fugen Sun
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
| | - Xiaomin Li
- Institute of Photovoltaics, Nanchang University, Nanchang 330031, China.
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