Journal of Coatings Technology and Research
·
2013
·Vol. 10
·期 5
·621-629
·
IF 1.094
Xiong Jinsu,Jin Yunquan,Shentu Baoqing,Weng Zhixue
Poly[1,2-propylene glycol-3-(2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptoxy)]phthalate (PDFP) was prepared by the reaction of phthalic anhydride, epichlorohydrin, and 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl glycidyl ether (DFGE). The structure of PDFP was characterized with 1 H-NMR, 19 F-NMR, FTIR and the wettability of water and oil on cured PDFP coatings was investigated by contact angle meter. The results showed that the contact angle of water and diiodomethane on cured coatings increased with the increase of the fluorine content and could maximally attain 108° and 69°, respectively. At a fluorine content of 0.75%, the surface energy was 21.1 mJ/m 2 . X-ray photoelectron spectroscopic (XPS) analysis showed that the surface F/C atomic ratio was much higher than the overall F/C molar ratio, indicating that the fluoroalkyl groups in PDFP had enriched on the coating surface. It was also found that the fluorinated polyester with longer fluoroalkyl groups had the higher tendency to enrich on the coating surface.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2022
·Vol. 6
·期 6
·2200209
·
IF 15.367
Xu-Feng Guo,Zhuo Yang,Yan-Fang Zhu,Xiao-Hao Liu,Xiang-Xi He,Li Li,Yun Qiao,Shu-Lei Chou
High energy density and long-term cycling stability are crucial factors for the commercialization of sodium batteries in large scale. In this regard, cathode materials that can operate at high voltage have attracted great interest owing to their high energy density. However, traditional electrolytes cannot be used in high-voltage sodium batteries due to their limited oxidative stability. Therefore, there is a great challenge to develop appropriate electrolytes for high-voltage cathode materials. Herein, a diluted fluoroethylene carbonate (FEC)-based electrolyte (1 m NaPF 6 in FEC/DMC = 2/8 by volume) is designed for Na 4 Co 3 (PO 4 ) 2 P 2 O 7 (NCPP) cathode with a high operation voltage of 4.7 V to achieve superior electrochemical performance with a capacity retention of 90.10% after 500 cycles at 0.5 C and capacity retention of 89.99% after 1000 cycles at 1 C. The excellent electrochemical performance of the NCPP||Na cells can be attributed to the formation of inorganic and robust NaF-rich cathode electrolyte interphase and F-rich solid electrolyte interface on high voltage NCPP cathode and Na metal anode, respectively. This work points out a very promising strategy to develop high-voltage sodium batteries toward practical applications.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jinwei Zhou,Rongyu Deng,Siyao Wu,Weihong Liang,Fulu Chu,Ming Hao,Feixiang Wu
Silicon–carbon (Si/C) anodes have emerged as promising alternatives to conventional graphite anodes for high-energy lithium-ion batteries (LIBs), owing to their higher specific capacity than graphite and enhanced cycling stability over pure silicon. However, the unstable solid electrolyte interphase (SEI) due to large volume changes during cycling is still a key bottleneck limiting their electrochemical performance. To address this critical limitation, the present study introduces wheat gluten (WG), a biomass-derived material from wheat, as a low-cost and sustainable binder for Si/C anodes. WG, rich in organic functional groups such as −COOH and −NH2, exhibits unique coordination capabilities with Li+. When employed as a binder, WG effectively induces the formation of Li+ solvated structures that weaken solvent coordination at the electrode surface/interface. This behavior facilitates the preferential growth of a LiF-rich SEI, thereby enhancing interfacial stability and mitigating capacity fade. Consequently, Si/C anodes employing WG binder (Si/C-WG) demonstrate remarkable cycling performance, delivering 95.9% capacity retention after 300 cycles at 0.5 A g–1, far surpassing that of conventional poly(vinylidene difluoride) (PVDF) binder, which retains only 59.5%. This study presents a novel strategy for designing functional binders optimized for Si/C anodes, offering critical insights to advance the development of high-performance anode materials in LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
锂离子电池
·
功能高分子材料
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界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qi Yang,Pengfei Ren,Guangming Cai
The demand for high energy density and safety has significantly promoted the development of all-solid-state lithium metal batteries. However, their practical use has been limited by the solid-solid interface and thermodynamic stability between lithium metal and solid electrolytes (SEs). Here, we constructed a hybrid interface via a thermal welding strategy to achieve stable cycling. Specifically, a dense and robust AlF 3 interface layer was constructed on the surface of the lithium metal via pressing and heat treatment. The lithiation products Li-Al alloy and LiF can effectively improve the interface contact and inhibit the growth of lithium dendrites. As a result, the critical current density (CCD) of the Li/Li symmetric cell significantly improved from 0.8 to 3.3 mA cm −2 , and the cycling life was dramatically increased to 6000 h at a high current density of 0.4 mA cm −2 . Moreover, the hybrid interface enabled stable cycling of both Li/Li symmetric and LiNi 0.6 Mn 0.2 Co 0.2 O 2 /Li cells even at high current densities. The modified layer material had been diversified to SnF 2 , ZnF 2 , and MgF 2 , thus supporting the general concept of thermal activation strategy. Such a design can be extended to other solid-state devices for better functioning and extended cycle life.
研究领域:
材料科学
·
储能
·
电化学
·
全固态电池
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Haifeng Tu,Linge Li,Zhicheng Wang,Jian Wang,Hongzhen Lin,Mingchao Wang,Cheng Yan,Meinan Liu
A solid electrolyte interphase (SEI) with robust mechanical property and high ionic conductivity is imperative for high-performance lithium metal batteries since it can efficiently impede the growth of notorious lithium dendrites. However, it is difficult to form such a SEI directly from an electrolyte. In this work, a crowding dilutant modified ionic liquid electrolyte (M-ILE) has been developed for this purpose. Simulations and experiments indicate that the 1,2-difluorobenzene (1,2-dfBen) dilutant not only creates a crowded electrolyte environment to promote the interaction of Li+–FSI–, leading to abundant aggregate ion pairs (AGGs), but also participates in the reduction to construct a robust and high ionic-conductive SEI. With this M-ILE, Li/LiFePO4 cells achieve a capacity retention of 96% over 250 cycles with 9.5 mg cm–2 mass loading, and Li/LiNi0.5Co0.2Mn0.3O2 cells also deliver a discharge capacity of 132 mAh g–1 with a high retention of 88% after 100 cycles. Therefore, the use of a crowding diluent is considered to be an efficient way to construct an advanced SEI for a Li anode.
研究领域:
电化学
·
储能技术
·
材料科学
·
锂离子电池
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Xiuling Dong,Xinyi Ge,Wei Chen,Shuangqing Li,Zheng Xing,Qingguo Zhang,Zhong-Xia Wang
The interface problem between Li anode and gel polymer electrolytes (GPEs) hinder the performance improvement and application of Li metal batteries (LMBs). Herein, a GPE showcasing high ionic conductivity (3.91 mS cm −1 ) and elastic modulus (6.04 MPa) as GPE based on poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was devised by introducing ionic liquids (ILs). The reconfiguration of Li ion solvation environment and the formation of LiF-rich solid electrolyte interface (SEI) protective layer have improved the interface problem. The LMB assembled from an optimized GPE- ET0.25 has stable Li deposition and excellent electrochemical properties , making the Li||LiFePO 4 (LFP) battery attaining an impressive long-cycle capacity retention rate of 96.0 %. This study emphasizes the advantages of IL aligned GPEs design, and the significance of forming stable SEI to improve battery performance, and provides ideas for the design of flexible LMBs with high safety and high performance.
研究领域:
材料科学
·
电化学
·
储能技术
·
高分子科学
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锂离子电池
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 32
·2304117
·
IF 15.1
Junwu Sang,Kecheng Pan,Bin Tang,Zhang Zhang,Yiyang Liu,Zhen Zhou
Li 6 PS 5 Cl (LPSC) solid electrolytes, based on Argyrodite, have shown potential for developing high energy density and safe all-solid-state lithium metal batteries. However, challenges such as interfacial reactions, uneven Li deposition, and air instability remain unresolved. To address these issues, a simple and effective approach is proposed to design and prepare a solid electrolyte with unique structural features: Li 6 PS 4 Cl 0.75 -OF 0.25 (LPSC-OF 0.25 ) with protective LiF@Li 2 O nanoshells and F and O-rich internal units. The LPSC-OF 0.25 electrolyte exhibits high ionic conductivity and the capability of “killing three birds with one stone” by improving the moist air tolerance, as well as the interface compatibility between the anode or cathode and the solid electrolyte. The improved performance is attributed to the peculiar morphology and the self-generating and self-healing interface coupling capability. When coupled with bare LiCoO 2 , the LPSC-OF 0.25 electrolyte enables stable operation under high cutoff voltage (≈4.65 V vs Li/Li + ), thick cathodes (25 mg cm −2 ), and large current density (800 cycles at 2 mA cm −2 ). This rationally designed solid electrolyte offers promising prospects for solid-state batteries with high energy and power density for future long-range electric vehicles and aircrafts.
研究领域:
材料科学
·
电化学
·
电池技术
·
储能技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）