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| 1 | 锂/硫电池的瓶颈问题及研究进展显示文摘锂/硫电池因为其较高的理论容量、资源丰富和价格低廉以及对环境友好等特点一直受到科学家们的广泛关注,但其缺点也尤为明显,主要是硫的导电性差、充放电过程中电极体积膨胀、存在着穿梭效应以及阳极会有锂枝晶生成等,这些瓶颈问题严重影响着锂/硫电池的商品化。针对上述问题人们进行了大量研究,主要从上述4个问题入手,对锂/硫电池的缺陷问题的研究进展进行详细论述,重点从正极材料、隔膜及电解液的改进方面进行阐述,如针对正极材料导电性差和体积膨胀问题,可以将活性硫与碳纳米管、碳纳米纤维等多孔导电物质进行复合,提高正极的导电能力和结构稳定性;负极锂枝晶问题可从改进隔膜强度和抑制锂枝晶生长两方面来改善;最后对锂/硫电池以后的发展趋势进行了展望。 | 陆继鑫 丁玉寅 祝鹏浩 王存国 | 2021 | 化工科技2021，29，6： | 2 |
| 2 | Enhancement of photoelectrochemical performance in ferroelectric films via the introduction of an Au buffer layer显示文摘The inefficient separation of photogenerated carriers has become a serious problem that limits the photoelectrochemical(PEC)performance of semiconductors.Herein,a sol-gel method was used to prepare BiFeO_(3) ferroelectric thin films with FTO and FTO/Au as substrates,respectively.The polarization electric field of the ferroelectric can more effectively separate the carriers generated in the photoelectrode.Meanwhile,the introduction of an Au buffer layer can reduce the resistance in the process of charge transfer,accelerate the carrier migration,and enhance the efficiency of the charge separation.Under light irradiation,Au/BiFeO_(3) photoelectrode exhibited an extraordinary improvement in PEC water splitting compared with BiFeO_(3).In addition,the ferroelectric polarization electric field causes band bending,which further accelerates the separation of electrons and holes and improves the PEC performance of the photoelectrode.This work promotes the effective application of ferroelectric films in PEC water splitting. | Dawei Cao Ming Li Jianfei Zhu Yanfang He Tong Chen Yuan Liu Mingming Chen Ying Yang | 2021 | Journal of Semiconductors2021，42，11： | 1 |
| 3 | Research progress of alkaline earth metal iron-based oxides as anodes for lithium-ion batteries显示文摘Anode materials are an essential part of lithium-ion batteries(LIBs),which determine the performance and safety of LIBs.Currently,graphite,as the anode material of commercial LIBs,is limited by its low theoretical capacity of 372 mA·h·g^(−1),thus hindering further development toward high-capacity and large-scale applications.Alkaline earth metal iron-based oxides are considered a promising candidate to replace graphite because of their low preparation cost,good thermal stability,superior stability,and high electrochemical performance.Nonetheless,many issues and challenges remain to be addressed.Herein,we systematically summarize the research progress of alkaline earth metal iron-based oxides as LIB anodes.Meanwhile,the material and structural properties,synthesis methods,electrochemical reaction mechanisms,and improvement strategies are introduced.Finally,existing challenges and future research directions are discussed to accelerate their practical application in commercial LIBs. | Mingyuan Ye Xiaorui Hao Jinfeng Zeng Lin Li Pengfei Wang Chenglin Zhang Li Liu Fanian Shi Yuhan Wu | 2024 | Journal of Semiconductors2024，45，2： | 0 |
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