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| 1 | Effect of Fumed SiO_2 on Pore Formation Mechanism and Various Performances of β-iPP Microporous Membrane Used for Lithium-ion Battery Separator显示文摘In this work, four samples containing different contents of fumed SiO_2 were prepared to improve the pore size distribution and various properties of b nucleated isotatic polypropylene(b-i PP) biaxial membrane used for lithium-ion battery separator. The wide-angle X-ray diffraction(WAXD) and differential scanning calorimetry(DSC) results show that the fumed SiO_2 promotes the formation of b-crystal slightly and narrows down the thickness distribution of b-lamellae; meanwhile, evenly distributed SiO_2 within b-i PP can be inspected by scanning electron microscopy(SEM). Moreover, further detailed characterization of morphological evolutions during biaxial stretching by tensile testing and SEM manifests that SiO_2 can strengthen b-i PP and make the samples deform more homogeneously, resulting in a gradually elaborate and finer oriented microfibril structure after longitudinal stretching, in which more uniform defects distribute between fibrils and restrain the formation of coarse fibrils effectively. Therefore, more superior microporous structure emerges with the addition of SiO_2, accompanied by narrower pore size distribution and better connectivity between microvoids, which is confirmed by mercury porosimeter and diminished Gurley value. Moreover, the lower thermal shrinkage, decreased shrinkage rate and suppressed porosity reduction indicate that fumed SiO_2 improves thermal and dimensional stability of membrane dramatically. Furthermore, due to the excellent wettability of SiO_2 with electrolyte, the microporous membranes doped with SiO_2 have higher electrolyte uptake, even after heat treatment at elevated temperature. | Lei Ding Guan Xu Qian Ge Tong Wu Feng Yang Ming Xiang | 2018 | Chinese Journal of Polymer Science2018，36，4： | 3 |
| 2 | 锂离子电池陶瓷隔膜材料研究进展显示文摘锂离子电池中隔膜是保证电池体系安全、影响电池性能的关键材料。聚烯烃类隔膜是当前主流隔膜,但这种材料的热稳定性较差,会引起潜在的安全问题。为提高电池安全性,在聚烯烃隔膜上涂覆陶瓷涂层成为技术发展趋势。本文围绕陶瓷涂覆隔膜的特点、作用以及国内外研究现状进行简要总结与分析,并对陶瓷隔膜材料的发展前景和未来方向进行了探讨。 | 康乐 李东红 张岩岩 | 2022 | 轻金属2022，，9： | 3 |
| 3 | POSS-(PMMA46)8浸渍涂覆商业PP隔膜的结构与性能显示文摘为了提高锂离子电池的安全性能,降低其界面阻抗,选用既具有优异耐热性能又与聚合物有良好相容性的POSS杂化聚甲基丙烯酸甲酯(POSS-(PMMA 46 ) 8)作为改性剂,通过在商业聚丙烯(PP)隔膜上浸渍POSS-(PMMA 46 ) 8制备改性商用PP隔膜,分析隔膜的力学性能、热收缩性能、界面性能、离子电导率及电化学性能。结果表明:当POSS-(PMMA 46 ) 8质量分数为40%时,复合膜的孔丰富均一,润湿性最佳,拉伸强度是未改性前的5.34倍,且在160℃/1h下具有较高的热稳定性。此复合膜电导率为1.35×10 -3 S/cm,与电极的界面阻抗由原来的743Ω降为152Ω;Li/改性隔膜/LiFePO 4扣式电池的充放电循环稳定性较好,低倍率下的电池容量与商业PP隔膜相当。 | 马敬玉 杨凯淇 张敏 杨晗 马晓燕 | 2019 | 材料工程2019，47，9： | 1 |
| 4 | Special Topic on environment and sustainable development:Editorial Office of Frontiers of Chemical Science and Engineering显示文摘 | | 2017 | Frontiers of Chemical Science and Engineering2017，11，3： | 1 |
| 5 | 具有热稳定性的锂离子电池隔膜材料研究进展显示文摘近年来,锂离子电池(LIBs)广泛用于电动汽车、便携式电子设备等储能系统,但是,在电池工作中频繁发生的热失控现象严重影响了使用电池的安全性。因此,开发具有热稳定性的锂离子电池隔膜材料势在必行。文中综述分析了目前商用聚烯烃隔膜的特点及缺陷,分别从聚烯烃隔膜的表面改性、新型的高耐热聚合物隔膜的开发与改性、赋予隔膜热关断性能等方面探究了提高锂电池隔膜的热稳定性方法,并提出了该研究方向的关键挑战和前景。 | 狄隆康 谢正伟 王庆印 王公应 姜宁 | 2022 | 高分子材料科学与工程2022，38，12： | 1 |
| 6 | 陶瓷隔膜在镍钴锰酸锂/石墨锂离子电池中性能显示文摘陶瓷隔膜广泛应用在动力锂离子电池中,直接影响到电池的电性能。选取了6种商品化的聚对苯二甲酸乙二酯(PET)/陶瓷复合膜和聚烯烃/陶瓷复合膜,研究了其表面形貌、接触角、透气度和吸液率。并选用这6种隔膜制作了容量为2A·h的镍钴锰酸锂/石墨软包锂离子电池,考察电池的内阻、自放电、容量、阻抗、倍率性能、循环寿命和高温浮充。结果表明,使用涂覆的陶瓷颗粒直径较小且均匀(0.2~0.5μm),高吸液率(2.0mg·cm^-2),低透气度[72s·(100mL)^-1]和较小内阻(4.65mΩ)的2号PET/陶瓷复合膜的锂离子电池综合性能最好,10C的高倍率下容量高达1C的94.9%,5C的大倍率循环500次后容量保持率高达102%,65°C高温浮充1000h后容量保持在初始的90.4%。 | 吴明霞 杨重阳 章庆林 陈思 安仲勋 周义荣 | 2019 | 储能科学与技术2019，8，4： | 0 |
| 7 | 聚偏氟乙烯及其共聚物用作高润湿性锂离子电池隔膜的研究进展显示文摘隔膜作为锂离子电池重要的组成部分,隔开电池正负两极并提供锂离子通行的通道。商用聚烯烃类隔膜存在电解液润湿性能差等缺点,降低了电池的电化学性能。具有高极性和耐热性等优点的聚偏氟乙烯(PVDF)及其共聚物,是制备锂离子电池隔膜的优良材料。综述了锂离子电池隔膜的种类(聚烯烃类、无纺布类和复合隔膜类),隔膜的性能参数要求如厚度、热稳定性和力学强度等,着重介绍了运用不同的改性方法制备锂离子电池用高润湿性PVDF及其共聚物基隔膜的研究进展。相比于商用聚烯烃类隔膜,PVDF及其共聚物基隔膜具有更好的电解液润湿性、热稳定性能和电化学性能。可以预测,随着PVDF及其共聚物基隔膜研究的进一步深入,隔膜的性能也将会得到进一步提升。 | 乔荣志 罗晓刚 | 2023 | 武汉工程大学学报2023，45，3： | 0 |
| 8 | Steps of fronts in chemical engineering:An overview of the publications of FCSE显示文摘The fronts of a subject could be perceived from the publications of top journals.We investigated four top journals on chemical engineering:AIChE Journal,Chemical Engineering Science,Industrial & Engineering Chemistry Research and Chemical Engineering Journal.Based on Web of Science,in the last five years,these four journals have published 21062papers,including 590highly cited papers and 31'hot'papers among which only 7are from Industrial &Engineering Chemistry Research and all the others from Chemical Engineering Journal (data obtained on November 17,2018).The traditional research 'Pure and pseudo-pure fluid thermophysical property evaluation and the open-source thermophysical property library CoolProp'is the most cited paper published in 2014[1].Both highly cited and 'hot'papers were published in 2017on electrodes of supercapacitors [2].But researches on environmental science and engineering have been paid most attention with 17of 27both highly cited and 'hot' papers on this research area.The most cited and 'hottest'paper is 'Boron nitride-based materials for the removal of pollutants from aqueous solutions:A review'in 2018[3]. Over the past decades,research and technologies advancement in chemical science and engineering in China has expanded in a lightning speed globally. | Xiaowen Zhu Yaodong Huang Jing-Kang Wang | 2018 | Frontiers of Chemical Science and Engineering2018，12，4： | 0 |
| 9 | Investigation of solution chemistry to enable efficient lithium recovery from low-concentration lithium-containing wastewater显示文摘In the production of lithium-ion batteries(LIBs)and recycling of spent LIBs,a large amount of low-concentration lithium-containing wastewater(LCW)is generated.The recovery of Li from this medium has attracted significant global attention from both the environmental and economic perspectives.To achieve effective Li recycling,the features of impurity removal and the interactions among different ions must be understood.However,it is generally dificult to ensure highly efficient removal of impurity ions while retaining Li in the solution for further recovery.In this study,the removal of typical impurity ions from LCW and the interactions between these species were systematically investigated from the thermodynamic and kinetics aspects.It was found that the main impurities(e.g.,Fe^+,AIP^+,Ca^2+,and Mg^2+)could be efficiently removed with high Li recovery by control-ling the ionic strength of the solution.The mechanisms of Fe^3+,Al^+,Ca^2+,and Mg^2+removal were investigated to identify the controlling steps and reaction kinetics.It was found that the precipitates are formed by a zero-order reaction,and the activation energies tend to be low with a sequence of fast chemical reactions that reach equilibrium very quickly.Moreover,this study focused on Li loss during removal of the impurities,and the corresponding removal rates of Fe^+,Al^+,Ca^2+,and Mg^2+were found to be 99.8%,99.5%,99%,and 99.7%,respectively.Conse-quently,high-purity LisPO4 was obtained via one-step precipitation.Thus,this research demonstrates a potential route for the effective recovery of Li from low-concentra-tion LCW and for the appropriate treatment of acidic LCW. | Chunlong Zhao Mingming He Hongbin Cao Xiaohong Zheng Wenfang Gao Yong Sun He Zhao Dalong Liu Yanling Zhang Zhi Sun | 2020 | Frontiers of Chemical Science and Engineering2020，14，4： | 0 |
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