COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Xuelian Fu,Yuchao Li,Chengzhu Liao,Weiping Gong,Mingyang Yang,Robert Kwok Yiu Li,Sie Chin Tjong,Zhouguang Lu
Low ionic conductivity and large interfacial impedance between the electrode and electrolyte are the main bottleneck issues of the current solid electrolytes . In this study, a novel 3D hierarchical solid electrolyte was developed to tackle the large interfacial impedance problem. A flexible polyethylene oxide/lithium chlorate (PEO/LiClO 4 ) was in-situ formed inside the 3D porous Li 6.28 La 3 Zr 2 Al 0.24 O 12 (LLZAO) network by simply using a cleanroom wiper as the template. The obtained 3D LLZAO-PEO/LiClO 4 composite solid electrolyte exhibited a high ionic conductivity of 2.25 × 10 −5 S cm −1 at 30 °C, being 30.7 times higher than that of pristine PEO/LiClO 4 electrolyte. The improved ionic conductivity was attributed to the 3D porous LLZAO structure with continuous fast ion transport pathways. In addition, the 3D LLZAO network can effectively inhibited the growth of lithium dendrite , leading to excellent stability and desirable safety during lithium stripping/plating cycling. Furthermore, the all-solid-state LiFePO 4 /Li battery system based on the obtained 3D LLZAO-PEO/LiClO 4 electrolyte showed a high initial discharge specific capacity of 143.8 mAh·g −1 and a high capacity retention of 86% after 200 cycles at 60 °C. This 3D composite solid electrolyte design is very effective in reducing the interfacial impedance and provides a solution for the further development of high-performance solid electrolyte for all-solid-state rechargeable batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
POLYMER
·
2015
·
IF 3.562
Shuhua Hou,Jifu Zheng,Suobo Zhang,Shenghai Li
A series of comb-like amphiphilic copolymers (PES-g-PEO) were synthesized through grafting poly(ethylene oxide) (PEO) to cardo poly(aryl ether sulfone) (PES-NH) backbone. By controlling the ratios of PEO and cardo poly(aryl ether sulfone), amphiphilic copolymers with a range of PEO side chain were obtained and were employed to ultrafiltration (UF) membranes. The PES-g-PEO-XX materials showed high thermal stability (T d > 238 °C) and good mechanical properties especially elongation at break reached to 150% compared to 23% of PES-NH. The contact angle of PES-g-PEO-80 asymmetric membrane was decreased to a slow as 59° which was 30° lower than the value of PES-NH membrane (90°), indicating that PES-g-PEO-80 membrane exhibited remarkable hydrophilic property . No protein adsorption was found on the surface of PES-g-PEO-60 and PES-g-PEO-80 membranes, showing excellent antifouling properties compared to PES-NH. The results of this work suggest that PES-g-PEO copolymers are promising materials for the fabrication of fouling resistant membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 12
·5695-5711
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IF 2.302
Xu Yongjing,Zou Liming,Lu Hongwei,Wei Yizhi,Hua Jianbing,Chen Shuyun
Abstract
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/polyethylene oxide (PEO) mats were fabricated by electrospinning in different weight ratios (i.e., 100/0, 90/10, 80/20, 70/30, 60/40, 50/50, 0/100). In this paper, dichloromethane (DCM) has been used as potential solvent for electrospinning. In order to evaluate the influence of PEO and DCM on the final properties of PHBV mat, the following characterization techniques were employed: scanning electron microscopy, Fourier transform infrared attenuated total reflectance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, differential scanning calorimetry, and the test of mechanical properties, water contact angle, porosity analysis, swelling properties, water–vapor transmission rate (WVTR) and in vitro degradation behavior. All PHBV/PEO electrospun mats consist of randomly oriented and distinctly separated fibers. The average fiber diameters and the porosity were 738–1098 nm and 80–90 %, respectively. The water contact angle, swelling ratio, WVTR, and in vitro degradation behavior of PHBV/PEO electrospun mats were 124°–55°, 265–436 %, 1977–2610 g m −2 day −1 , and 17–50 %, respectively. Besides, the crystallinity degree of PHBV/PEO electrospun mats has decreased with the increasing of PEO content. Therefore, PEO imparted PHBV/PEO electrospun mats on better properties, improving the nature defects of PHBV. In particular, PHBV/PEO 70/30 electrospun mat with optimizing performance, was considered the best candidate for potential scaffold in skin tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 36
·2302139
·
IF 27.8
Ling Li,Jong Seok Nam,Min Soo Kim,Yifan Wang,Shaohua Jiang,Haoqing Hou,Il-Doo Kim
To address the problem of the serious capacity fading in lithium–sulfur batteries, a multi-functional PEO(polyethylene oxide)/LiFSI (lithium bis(fluorosulfonyl)imide)/PVDF (polyvinylidene fluoride) (PLP) gel polymer electrolyte is exploited by coating PLP on a carbon nanotubes (CNTs) based sulfur cathode (PLP-S/CNTs) with a controlled thermal annealing process. The annealing process leads to the conformal infusion of PLP through the matrix of S/CNTs with retaining the amorphous phase of the PLP, which enhance the rate performance compared to the bare S/CNTs. The PLP coating drives the transformation of more elemental sulfur to Li 2 S 2 /Li 2 S without forming intermediary product by restraining soluble-polysulfides formation. Furthermore, the PLP coating successfully inhibits the dissolution of Li 2 S x ( x > 4) in PEO and prevents the loss of active material in the cathode, which is confirmed by density functional theory calculations. Comprehensively, the PLP coating applied to the surface of the S/CNTs cathode exhibit significantly suppressed shuttle effect and greatly improve long-term cycle stability of the lithium–sulfur battery. The synthesized PLP-coated S/CNTs composite cathode demonstrates a high specific capacity of 573.6 mAh g −1 at a current density of 0.5 C after 1 000 cycles, even achieving 318.1 mAh g −1 at an extremely high C-rate (6 C). which is unprecedented performance among the reported studies on coating technology.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Samson Ho-Sum Cheng,Kang-Qiang He,Ying Liu,Jun-Wei Zha,Md Kamruzzaman,Robin Lok-Wang Ma,Zhi-Min Dang,Robert K.Y. Li,C.Y. Chung
All-solid-state batteries are proposed to have ultimate safety and higher power and energy densities over conventional lithium ion batteries with liquid electrolytes . The Li ion conductivity and interfacial resistance between electrolyte and electrodes are the major bottleneck of the development of all-solid-state batteries for practical uses. Here, we reported a novel composite electrolyte which is composed of uniform distributed Li ion conducting Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) fillers in PEO/LiClO 4 matrix. The EO:Li + ratio of 15:1 is being used to achieve lower interfacial resistance between electrolyte and electrodes through the melting process. The composite electrolyte is fabricated by simple solution casting method, which is more advantageous comparing with high temperature sintering or sol-gel method used in the fabrication of ceramic electrolytes. The composite electrolyte exhibits good Li ion conductivity of 4.8 × 10 −4 Scm −1 at 60 °C and excellent interfacial stability against Li metal. The all-solid-state lithium battery using this composite electrolyte shows a specific capacity of 140mAhg −1 and an unprecedentedly high capacity retention of 83% after 500 cycles at 60 °C and the rate of 1C. It is concluded that good electrode/electrolyte interfacial stability and contact as well as fast Li ion conductivity obtained by the addition of active garnet particulates to PEO/LiClO 4 matrix are essential criteria for good charge/discharge performance of all-solid-state lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 5
·1245-1255
·
IF 5.6
Furong Zhang,Kunpeng Jiang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Yejun Zhang,Qiangbin Wang,Pengfei Pang,Aibing Yu
Solid-state lithium batteries (SSLBs) are promising energy-storage devices. However, the low ionic conductivity of solid electrolytes and poor interface stability are two challenges to their commercial application. To alleviate these problems, we investigated three different composite modes of ZIF-8 and SiO2: (1) mechanical mixing of ZIF-8 and mesoporous SiO2 (ZIF-8+SiO2); (2) mesoporous SiO2 spheres adsorbed on the surface of ZIF-8 (ZIF-8/SiO2); (3) mesoporous SiO2 shell deposited on the surface of ZIF-8 (ZIF-8@SiO2). In particular, ZIF-8@SiO2/IL was obtained when ZIF-8@SiO2 with a hierarchical pore structure was used as the host of the Li+-containing ionic liquid (IL). By combining ZIF-8@SiO2/IL as a filler with polyethylene oxide and lithium bis(trifluoromethanesulfonyl)imide, the composite electrolyte (PZS-3) showed excellent performance. PZS-3 showed a high ionic conductivity (2.35 × 10−4 S cm−1 at 30 °C), wide electrochemical stability window (5.5 V), and high Li+ transference number (0.6), and excellent compatibility with the Li metal and electrodes. An SSLB composed of LiFePO4/PZS-3/Li exhibited outstanding cycling stability with an initial discharge capacity of 155.6 mA h g−1 at 0.2 C and capacity retention of 96.5% after 100 cycles. This novel design strategy offers a promising approach for MOFs composited with other inorganic materials to construct prospective hierarchical Li+ channels.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Shiyan Deng,Huiyao Li,Wenhao Tang,Youlan Zou,Shuang Deng
Graphical The advantages of quantum size effect and lithiophilic characteristics of ZnO QDs ensure the sufficient contact and uniform distribution with PEO chains, enhance the REDOX kinetics at the Li/PEO interface and the stability of Li anode. Li/PEO/Li and Li/PEO/LiFePO 4 cells with 3 wt.% ZnO QDs electrolyte fillers can work steadily and provide considerable reversible capacity. PEO-based solid polymer electrolyte (PEO SPE) is regarded as one of the most promising solid electrolytes due to its exceptional flexibility, cost-effectiveness, and ease of integration. However, its commercialization is hindered by inadequate ionic conductivity and unstable interface. By incorporating proper ZnO quantum-dots (QDs) fillers with enhanced surface activity, the ion transport inner the PEO-based electrolyte can be improved along with enhanced REDOX kinetics at the Li/PEO interface. The ionic conductivity reaches 5.97×10 −4 S cm −1 at 60 °C. Moreover, ZnO QDs exhibit a quantum size effect and possess lithiophilic characteristics that promote uniform nucleation and redeposition of Li + while forming a stable Li−Zn alloy. This inhibits lithium dendrite formation and enhances the stability of Li anode. Li//Li cell with 3 % ZnO QDs works steadily for more than 2100 h at 60 °C with 0.1 mA cm −2 . The assembled Li//LiFePO 4 cell provides a reversible capacity of 134.91 mAh g −1 after200 cycles at 0.1 C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 3
·1315-1323
·
IF 6.788
Laiqiang Xu,Jiayang Li,Wentao Deng,Lin Li,Guoqiang Zou,Hongshuai Hou,Lanping Huang,Xiaobo Ji
Poly(ethylene oxide) (PEO)-based polymer electrolytes are extensively investigated, and they have rapidly developed in all-solid-state batteries (ASSBs) over recent years for their good interface contact with electrodes, easy shaping and decent flexibility. However, their low ionic conductivity remains a serious issue to be solved urgently. Researchers have found that the addition of fillers can improve the ionic conductivity via creating more amorphous regions conducive to ion transport in PEO. Here, we adopted waste eggshell as a precursor to prepare a sub-micron filler, which is mainly CaO, and it was added into the PEO electrolyte to get a composite polymer electrolyte. Close contact via Lewis base-acid interaction between CaO and PEO can be obtained, as CaO is an effective filler with strong alkalinity. To the best of our knowledge, this is the first time it is applied in the PEO electrolyte. The filler significantly decreases the crystallinity of PEO, and hence, boosted ionic conductivity of the composite polymer electrolyte is observed, which is about 4.5 times higher than that of the polymer reference electrolyte. It additionally brings a higher tensile strength along with a more stable electrochemical window (up to 5 V) to the composite electrolyte. Therefore, as expected, the all-solid-state Li/Na battery with this composite electrolyte exhibits long cycling life and excellent rate performances. The corresponding Li/LiFeO4 battery has a stable capacity of 142.8 mA h g−1 at 1C after 200 cycles, and the corresponding solid-state Na/Na3V2(PO4)3 battery gives a reversible capacity of 101.2 mA h g−1 at 0.5C after 100 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 31
·16787-16797
·
IF 12.732
Maoyi Yi,Jie Li,Xinming Fan,Maohui Bai,Zhi Zhang,Bo Hong,Zhian Zhang,Guorong Hu,Huai Jiang,Yanqing Lai
PEO-based composite electrolytes are very promising in all-solid-state batteries (ASSBs). To achieve ASSBs with high energy density, PEO based composite electrolytes should match high-voltage cathodes, but the stability of the cathode interface is a challenging issue. Herein, we investigate the electrochemical performance of single-crystal LiNi0.6Mn0.1Co0.3O2 (SC-NMC613) in ASSBs with PEO-based electrolytes, and compare the electrochemical performance of SC-NMC613 with conventional polycrystalline LiNi0.6Mn0.1Co0.3O2 (PC-NMC613) systematically. The Li+ diffusion coefficient of SC-NMC613 is 2–4 times higher than that of PC-NCM613 in ASSBs. SC-NCM613 shows high initial specific capacity (152 mA h g−1) at 0.5C, stable cycling performance (100 cycles, retention of 108.9 mA h g−1), and exceptional rate capability even without surface modification, while PC-NCM613 shows low initial specific capacity (137.5 mA h g−1) at 0.5C, poor cycling performance (100 cycles, retention of 90.1 mA h g−1), and poor rate capability in ASSBs. The severe cycling degradation of PC-NCM613 is mainly attributed to the structural deterioration inside particles and the formation of a rock-salt phase. The SC-NCM613 particles observably alleviate the generation of intergranular cracks and decelerate the formation of the rock-salt phase. SC-NCM cathodes in ASSBs with PEO-based electrolyte are beneficial to the stability of the cathode interface. Therefore, developing single-crystal Ni-rich cathodes represents a promising strategy to achieve ASSBs with both high energy density and power density.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Youlan Zou,Yanhong He,Huiyao Li,Shiyan Deng,Wenhao Tang,Shuang Deng
In order to solve the problems of low ionic conductivity, low lithium-ion transference number and weak mechanical strength of PEO solid polymer electrolytes (SPEs), this paper proposes to prepare composite cross-linked network polymer electrolytes (PEO-AAEM) through UV crosslinked polymerization of allyl acetoacetate (AAEM) and N- N -methylene diacrylamide (MBA) within the PEO SPEs. The amide group within the cross-linked network facilitates the dissociation of Li + , while the carbonyl group serves as a conduit for Li + transport. The PEO-AAEM SPEs exhibit the ionic conductivity of 5.4×10 −4 S cm −1 , with a lithium-ion transference number of 0.54 at 60 °C. The assembled Li//Li battery with proper AAEM content can be stably cycled for 2000 h at 0.2 mA cm −2 current, and LiFePO 4 //Li battery maintains a reversible capacity of 100 mA h g −1 after 500 cycles at 0.2C. This work offers a viable pathway for developing SPEs with improved electrochemical performance for all solid-state lithium metal batteries (ASSLMBs).
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Shuhua Hou,Xiaojia Wang,Xue Dong,Jifu Zheng,Shenghai Li
Functionalized polysulfone (PSf) membranes with combined antibacterial and antifouling properties were fabricated by incorporating a poly(ethyleneoxide)-grafted (PEO-grafted) amphiliic polymer. Both antifouling and antibacterial groups were easily introduced onto the membrane surfaces through non-solvent induced phase separon process and a simple chlorination process. It was observed that the functionalized membranes were effectivatie in resisting both protein absorption and bacterial adhesion. Furthermore, the functionalized membrane ( M3-Cl ) showed mostly suppressed irreversible flux decline and a 97% flux recovery ratio after simple washing during the separation process, indicating excellent antifouling properties. Meanwhile, the functionalized PSf membrane exhibited efficient biocidal activity against E. coli and S. aureus . These modified functionalized PSf membranes also displayed outstanding properties in inhibiting the formation of biofilm . Moreover, the antibacterial feature was renewable by a simple process.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Rong-Ao Tong,Linhui Chen,Bingbing Fan,Gang Shao,Ruiping Liu,Chang-An Wang
All solid-state lithium metal batteries are viewed as a potential next-generation energy storage technology due to their high energy density and better safety performance. The study on solid-state electrolytes (SSE) is of crucial importance for the development of technology in this field. Here, we develop a solvent-free preparation and matrix modification process for all-solid-state composite electrolytes (CSEs) based on the blended PVDF-HFP/PEO polymer matrix, and systematically study the effects of the solvent-free process on their properties. The results show that the solvent-free PVDF-HFP/PEO/10 wt % LLZTO solid-state electrolytes (1:1 mass ratio blended polymer matrix) combine the electrochemical and mechanical advantages of both polymers, thus-prepared electrolytes perform excellent tensile strength and ductility (over 500% strain for polymer matrix as well as 170% strain and 4.78 MPa strength for CSEs), and the ionic conductivity can reach ∼6.2 × 10–4 S·cm–1 at 80 °C. At the same time, the electrochemical stability and cycle stability of the electrolytes are enhanced due to the optimized process. The discoloration reaction of PVDF-HFP in composite electrolytes is further studied in this work as well. In addition to excellent performance, the simple process based on the solvent-free method also lays the foundation for scale-up production.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）