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锂离子电池过充行为实验研究

电源技术 2024年第6期48卷 1074-1082页

作者：潘斌钱其峰戴松元华北电力大学新能源电力系统国家重点实验室北京102206 浙江芯能光伏科技股份有限公司浙江嘉兴314400

过充电是造成锂离子电池系统热失控的主要原因之一,研究锂离子电池过充前后的性能参数变化规律是实现电池热失控及时预警的基础。以方壳磷酸铁锂(LFP/GC)电池为研究对象,研究了电池过充至不同截止电压后的外特性参数变化规律,并定性评... 详细信息

过充电是造成锂离子电池系统热失控的主要原因之一,研究锂离子电池过充前后的性能参数变化规律是实现电池热失控及时预警的基础。以方壳磷酸铁锂(LFP/GC)电池为研究对象,研究了电池过充至不同截止电压后的外特性参数变化规律,并定性评估其热失控风险。结果表明,锂离子电池过充后电化学极化内阻变化明显,与电池过充程度紧密关联,过充至4.5 V时急剧增大至初始值6倍,同时电池内部压力也随过充而增加。电池过充后,检测到电池直流内阻分量和膨胀压力的明显变化,可以将其作为判断过充是否严重的重要依据,研究成果可以为电池管理系统(BMS)和能量管理系统(EMS)特征参数的选取提供参考,作为电池系统风险预警和安全监控的重要依据。

关键词：锂离子电池热失控过充

迷走神经刺激在慢性心力衰竭炎症及凋亡机制中的应用研究进展

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中国全科医学 2024年第24期27卷 3044-3050页

作者：胡宇驰代松源赵玲赵璐露昆明医科大学附属第一医院心内科云南省昆明市650500

心迷走神经作为心脏自主神经系统重要的神经,对于慢性心力衰竭的治疗有着重要的作用。近年来,多个研究发现迷走神经刺激通过减少炎性因子及相关蛋白的表达、凋亡相关蛋白的表达,来改善心肌功能及心室重塑等,从而对心脏功能进行保护,延... 详细信息

心迷走神经作为心脏自主神经系统重要的神经,对于慢性心力衰竭的治疗有着重要的作用。近年来,多个研究发现迷走神经刺激通过减少炎性因子及相关蛋白的表达、凋亡相关蛋白的表达,来改善心肌功能及心室重塑等,从而对心脏功能进行保护,延缓慢性心力衰竭的进展。然而,关于迷走神经在慢性心力衰竭炎症及凋亡机制的相关报道较少,因此本文综述了心迷走神经的解剖、治疗的可能机制、迷走神经刺激实用参数以及近年来有关迷走神经刺激在慢性心力衰竭炎症和凋亡机制中的应用和最新临床进展,为后续相关研究开展提供借鉴。

关键词：心力衰竭迷走神经刺激术慢性心力衰竭炎症凋亡综述

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添加剂提高宽带隙钙钛矿太阳电池的性能

太阳能学报 2024年第4期45卷 30-35页

作者：李卓芯冯旭铮陈香港刘雪朋戴松元蔡墨朗华北电力大学新能源学院北京102206

该文研究聚对苯乙烯磺酸钠(PSS)对宽带隙钙钛矿薄膜及电池的影响。研究发现PSS添加剂可改善宽带隙钙钛矿薄膜的形貌,提升结晶度并减少缺陷态密度,这有利于抑制混合卤素宽带隙钙钛矿薄膜的相分离问题。J-V测试结果表明钝化后的宽带隙钙... 详细信息

该文研究聚对苯乙烯磺酸钠(PSS)对宽带隙钙钛矿薄膜及电池的影响。研究发现PSS添加剂可改善宽带隙钙钛矿薄膜的形貌,提升结晶度并减少缺陷态密度,这有利于抑制混合卤素宽带隙钙钛矿薄膜的相分离问题。J-V测试结果表明钝化后的宽带隙钙钛矿太阳电池性能得到明显提升。在掺有PSS的宽带隙钙钛矿太阳电池中,开路电压最高可达1.23 V,效率最高可达20.54%,并且相分离被抑制后的封装钙钛矿太阳电池稳定性显著改善,在一个太阳连续光照500 h后,电池效率仍可保持在初始效率的81.9%(氮气环境,温度40℃)。

关键词：钙钛矿太阳电池宽带隙结晶度缺陷钝化相分离性能

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自组装单分子空穴传输层在反式钙钛矿太阳电池的研究进展

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化学学报 2024年第3期82卷 348-366页

作者：刘雪朋李博桐韩明远张先付陈建林戴松元华北电力大学新能源学院新型薄膜太阳电池北京市重点实验室北京102206

空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9,9'-螺二... 详细信息

空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9,9'-螺二芴(spiro-OMe TAD)、聚[双(4-苯基)(2,4,6-三甲基苯基)胺](PTAA)等,空穴迁移率低、价格昂贵等缺点限制了其规模化应用.近年来,在反式PSC中自组装单分子层(self-assembledmonolayers,SAM)作为空穴传输层广泛应用,提升了器件性能.SAM分子结构中含有锚定官能团,可以在衬底上形成单分子薄膜,有着材料消耗小、无需添加剂、寄生吸收低、能够兼容叠层器件和有利于大面积制造等优点,已成为PSC领域的研究热点.本综述结合PSC发展,按照SAM分子结构中锚定基团的不同,对近年来基于SAM的空穴传输层的研究进行了分类和归纳,结合分子骨架变化分析了结构变化对其特性及器件性能的影响.最后,对SAM作为空穴传输层的发展做了总结和展望.

关键词：钙钛矿太阳电池空穴传输材料自组装单分子层光电转换效率稳定性

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Heteroatom engineering on spiro-type hole transporting materials for perovskite solar cells

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Journal of Energy Chemistry 2022年第4期31卷 19-26页

作者： Xianfu Zhang Xuepeng Liu Nan Wu Rahim Ghadari Mingyuan Han Ying Wang Yong Ding Molang Cai Zuopeng Qu songyuan dai School of New Energy North China Electric Power UniversityBeijing 102206.China Computational Chemistry Laboratory Department of Organic and BiochemistryFaculty of ChemistryUniversity of TabrizTabriz ***Iran

A series of spiro-type hole transporting materials, spiro-OMe TAD, spiro-SMe TAD and spiro-OSMe TAD,with methoxy, methylsulfanyl or half methoxy and half methylsulfanyl terminal groups are designed and prepared. The impact of varied terminal groups on bulk properties, such as photophysical, electrochemical, thermal, hole extraction, and photovoltaic performance in perovskite solar cells is *** is noted that the terminal groups of the hole transporting material with half methoxy and half methylsulfanyl exhibit a better device performance and decreased hysteresis compared with all methoxy or methylsulfanyl counterparts due to better film-forming ability and improved hole extraction ***, the spiro-OSMe TAD also shows comparable performance than high-purity commercial spiro-OMe TAD. Moreover, the highest power conversion efficiency of the optimized device employing spiro-OSMe TAD exceeding 20% has been achieved.

关键词： Hole transporting materials Methylsulfanyl Methoxy Perovskite solar cells

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钙钛矿太阳电池中螺环小分子空穴传输材料

化学进展 2024年第5期36卷 613-632页

作者：周颖刘雪朋张先付韩明远陈建林梁永鹏李博桐丁勇蔡墨朗戴松元华北电力大学新能源学院、新型薄膜太阳电池北京市重点实验室北京102206

空穴传输材料的性能直接影响钙钛矿太阳电池中空穴在电池中的传输和电子-空穴的复合,从而决定电池性能。螺环结构特殊的正交分子构象使分子易于在钙钛矿薄膜上形成良好的接触、具有均匀的电荷传输特性、较高的玻璃化转变温度等优点,该... 详细信息

空穴传输材料的性能直接影响钙钛矿太阳电池中空穴在电池中的传输和电子-空穴的复合,从而决定电池性能。螺环结构特殊的正交分子构象使分子易于在钙钛矿薄膜上形成良好的接触、具有均匀的电荷传输特性、较高的玻璃化转变温度等优点,该材料已广泛作为高效空穴传输材料骨架单元应用于钙钛矿太阳电池。本论文概述了小分子螺环空穴传输材料的研究进展,主要从分子末端官能团优化和螺环核调控两个方面总结了分子结构变化对材料光物理、电化学、热稳定性、空穴传输特性及在钙钛矿太阳电池中的性能等的影响,同时本论文也对该领域的发展和高性能螺环空穴传输材料的发展和研究趋势进行了预测。

关键词：钙钛矿太阳电池空穴传输材料螺环结构光电转换效率

Enlarging grain sizes for efficient perovskite solar cells by methylamine chloride assisted recrystallization

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Journal of Energy Chemistry 2022年第2期31卷 55-61页

作者： Gao Wu Molang Cai Yujia Cao Zhuoxin Li Zhongyan Zhang Weng Yang Xianggang Chen Dongxu Ren Yaqi Mo Miao Yang Xuepeng Liu songyuan dai State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Key Laboratory of Novel Thin-Film Solar Cells North China Electric Power UniversityBeijing 102206China Jiangsu Shunfeng Photovoltaic Technology Co.Ltd. Changzhou 213164JiangsuChina

The quality of MAPbI3 film prepared by solvent engineering process highly depends on environment and antisolvent ***,we provided a simple methylamine chloride(MACl)solution treatment using a two-step process to enlarge the perovskite crystal grain sizes to more than 1 *** than treatment on the film surface,the MACl solution diffuses into the MAPbI_(3) films to assist the recrystallization of small crystal at the bottom of perovskite *** imitative contact between perovskite and substrate is ***,the enlargement of grain size and ten times enhancement of crystalline reduce trap-assisted recombination of perovskite ***,the significant improvement of cell efficiency of 20.89%as well as device stability is obtained with the MACl treatment.

关键词： Perovskite solar cells Methylamine chloride Large grain size High efficiency

Regulating the mesogenic properties of imidazolium salts by modifying N3-substituents

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Science China Chemistry 2015年第12期58卷 1884-1890页

作者： Meng Wang Xu Pan Jian Chen songyuan dai Anhui Electric Power Design Institute Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma Physics Chinese Academy of Sciences Beijing Key Laboratory of Novel Thin Film Solar Cells North China Electric Power University

In this study, a series of imidazolium salts with different N3-substituents(3-position: methyl, vinyl, ethyl, n-propyl, n-butyl)-based ionic-liquid crystals with iodide as counterion(ILCs) are synthesized and characterized, with the aim of regulating the mesogenic properties of imidazolium salts. The imidazolium salts-based ionic-liquid crystals are characterized by thermal analysis, polarized optical microscopy, X-ray powder diffraction, and single-crystalline diffraction. Liquid crystalline phase with a Smectic A phase interdigitated bilayer structure is observed. The mesophase temperature range decreases with the increase of the alkyl chain length of N3-substituent. While when vinyl is attached to the N3 position, intermolecular ?-? interactions are formed in adjacent layers, which exert a positive effect on the formation of mesophase. The layer-spacing of imidazolium salts keeps increasing with the increase of the alkyl chain length attached to both the N1 and N3 positions, and gradually decreases with the increasing temperature in liquid crystalline phase. The 1-alkyl-3-vinylimidazolium salt has the smallest layer-spacing, due to the intermolecular ?-? interactions between the vinyl and imidazolium rings in adjacent layers.

关键词： ionic liquid crystals mesogenic properties regulate N3-substituents

Synergistic effect of TiO_2 hierarchical submicrospheres for high performance dye-sensitized solar cells

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Science China Chemistry 2017年第6期60卷 822-828页

作者： Jiang Sheng Linhua Hu Li'e Mo Jichun Ye songyuan dai Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Key Laboratory of Novel Thin Film Solar Cells Institute of Applied Technology Chinese Academy of Sciences State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University

The performance of dye-sensitized solar cells(DSCs) could be improved by using rationally designed mesoporous film structure for electron collection, dye adsorption and light scattering. The development of a novel double layer film prepared by TiO_2 hierarchical submicrospheres and nanoparticles was reported in this article. The submicrospheres were composed of rutile nanorods of 10 nm diameter and the length of 150–250 nm, which facilitated fast electron transport, charge collection and light scattering. Using a double layer structure consisting of the 10 wt% film as a dye loading layer and the 50 wt% film as the light scattering layer, C101 sensitizer and liquid electrolyte, DSC yielded power conversion efficiency of 9.68% under 1 sun illumination.

关键词： dye-sensitized solar cells rutile hierarchical submicrospheres high light harvesting high electron collection efficiency