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A cross-linked polyacrylamide electrolyte with high ionic conductivity for compressible supercapacitors with wide temperature tolerance

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Nano Research 2019年第5期12卷 1199-1206页

作者： Xuting Jin Guoqiang Sun Guofeng zhang Hongsheng Yang Yukun Xiao Jian Gao zhipan zhang Liangti Qu Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of Education of ChinaSchool of ChemistryBeijing Institute of TechnologyBeijing 100081China

The development of compressible supercapacitors (SCs) that is tolerant to wide temperature range has been severely hindered due to the poor ionic conductivity and absence of extra functions in conventional polymer ***,a highly conductive and compressible hydrogel polyelectrolyte has been prepared from polyacrylamide cross-linked by methacrylated graphene oxide (MGO-PAM) and the polyelectrolyte can maintain its excellent elasticity at-30 ℃ as well as its original shape at 100 ℃.As a result,the SC based on the MGO-PAM polyelectrolyte outperformed those fabricated with the conventional poly(vinyl alcohol)(PVA)/H2SO4 electrolyte over a wide temperature window between-30 and 100 ℃.Meanwhile,the device shows an excellent cycling stability (capacitance retention of 93.3% after 8,000 cycles at-30 ℃ and 76.5 % after 4,000 cycles under 100 ℃) and a reversible compressibility (a high capacitance retention of 94.1% under 80% compression).Therefore,the MGO-PAM polyelectrolyte enables the fabrication of compressible SCs with a wide operating temperature,rendering new insights for developing next-generation robust and multifunctional energy-storage devices.

关键词： ionic conductivity compressibility wide temperature tolerance supercapacitors polyacrylamide electrolyte

Recent progress and challenges in interdigital microbatteries:Fabrication, functionalization and integration

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Journal of Energy Chemistry 2023年第3期78卷 294-314,I0009页

作者： Li Song Xuting Jin Chunlong Dai Yuyang Han Jiatao zhang Yang Zhao zhipan zhang Liangti Qu Key Laboratory of Cluster Science Ministry of Education of ChinaKey Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001Henan China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

Currently,the increasing demands for portable,implantable,and wearable electronics have triggered the interest in miniaturized energy storage *** from conventional energy storage devices,interdigital microbatteries(IMBs) are free of separators and prepared on a single substrate,potentially achieving a short ionic diffusion path and better ***,they can be easily fabricated and integrated into on-chip miniaturized electronics,holding the promise to provide long-lasting power for advanced microelectronic *** date,while many seminal works have been reviewed the topic of microbatteries,there is no work that systematically summarizes the development of IMBs of high energy density and stable voltage platforms from fabrication,functionalization to *** current review focuses on the most recent progress in IMBs,discussing advanced micromachining techniques with compatible features to construct high-performance IMBs with smart functions and intelligent integrated *** future opportunities and challenges of IMBs are also highlighted,calling for more efforts in this dynamic and fast-growing research field.

关键词： Interdigital microbatteries Fabrication Functionalization

Efficient and Stable Large-Area Perovskite Solar Cells with Inorganic Perovskite/Carbon Quantum Dot-Graded Heterojunction

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Research 2021年第1期2021卷 1274-1283页

作者： Qiang Sun Cai Shen Deyu Wang Tao zhang Huaxia Ban Yan Shen zhipan zhang Xiao-Li zhang Guanjun Yang Mingkui Wang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanHubei 430074China Ningbo Institute of Materials Technology&Engineering Chinese Academy of Sciences1219 Zhongguan RoadNingbo 315201China School of Chemistry Beijing Institute of TechnologyBeijing 102488China State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou University450001China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China

This work reports on a compositionally graded heterojunction for photovoltaic application by cooperating fluorine-doped carbon quantum dots(FCQDs in short)into the CsPbI_(2.5)Br_(0.5)inorganic perovskite *** this CsPbI_(2.5)Br_(0.5)/FCQDs graded heterojunction in conjunction with low-temperature-processed carbon electrode,a power conversion efficiency of 13.53%for 1 cm^(2)all-inorganic perovskite solar cell can be achieved at AM 1.5G solar *** the best of our knowledge,this is one of the highest efficiency reported for carbon electrode based all-inorganic perovskite solar cells so far,and the first report of 1 cm^(2)carbon counter electrode based inorganic perovskite solar cell with PCE exceeding 13%.Moreover,the inorganic perovskite/carbon quantum dot graded heterojunction photovoltaics maintained over 90%of their initial efficiency after thermal aging at 85°for 1056 *** conception of constructing inorganic perovskite/FCQDs graded heterojunction offers a feasible pathway to develop efficient and stable photovoltaics for scale-up and practical applications.

关键词： perovskite inorganic graded

Facile production of ultrathin graphitic carbon nitride nanoplatelets for efficient visible-light water splitting

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Nano Research 2015年第5期8卷 1718-1728页

作者： Qing Han Fei Zhao Chuangang Hu Lingxiao Lv zhipan zhang Nan Chen Liangti Qu Key Laboratory of Cluster Science Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry Beijing Institute of Technology Beijing 100081 China

Ultrathin graphitic carbon nitride nanoplatelets （UGCNPs） are synthesized by a facile manner via an efficient and eco-friendly ball milling approach. The obtained UGCNPs are 2-6 nm in size and 0.35-0.7 nm in thickness, with improved specific surface area over that of bulk graphitic carbon nitride. Photochemical experiments show that the UGCNPs are highly active in visible-light water splitting, with a hydrogen evolution rate of 1,365 μmol·h^-1·g^-1, which is 13.7-fold greater than that of their bulk counterparts. The notable improvement in the hydrogen evolution rate observed with UGCNPs under visible light is due to the synergistic effects derived from the increased specific surface area, reduced thickness, and a negative shift in the conduction band concomitant with the exfoliation of bulk graphitic carbon nitride into UGCNPs. In addition to metal- free visible-light-driven photocatalytic hydrogen production, the UGCNPs find attractive applications in biomedical imaging and optoelectronics because of their superior luminescence characteristics.

关键词： ultrathin graphitic carbon nitride nanoplatelets eco-friendl photocatalyst hydrogen production visible-light water splitting

Recent progress in graphene-based electrodes for flexible batteries

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InfoMat 2020年第3期2卷 509-526页

作者： Chunlong Dai Guoqiang Sun Linyu Hu Yukun Xiao zhipan zhang Liangti Qu Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingPeople's Republic of China Department of Chemistry Tsinghua UniversityBeijingPeople's Republic of China Key Laboratory for Advanced Materials Processing Technology Ministry of Education of ChinaDepartment of Mechanical EngineeringTsinghua UniversityBeijingPeople's Republic of China

The emerging flexible electronic devices have stimulated the development of flexible batteries,in which flexible electrodes are indispensable ***,known for its excellent electrical conductivity and mechanical stability,can be used as an ideal flexible ***,many efforts have been devoted to graphene-based electrodes for flexible ***,this review summarizes recent advances in the development of graphene-based electrodes for various flexible batteries,including metal-ion batteries(ions of Li,Na,Zn,Al,etc.),lithiumsulfur batteries,and metal-air batteries(Li-and Zn-air batteries).Besides,major challenges and future developments of flexible batteries are also discussed.

关键词： flexible batteries flexible electrodes graphen

Ultrafast Synthesis of Metal-Layered Hydroxides in a Dozen Seconds for High-Performance Aqueous Zn(Micro-)Battery

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Nano-Micro Letters 2023年第3期15卷 16-31页

作者： Xiangyang Li Fangshuai Chen Bo Zhao Shaohua zhang Xiaoyu Zheng Ying Wang Xuting Jin Chunlong Dai Jiaqi Wang Jing Xie zhipan zhang Yang Zhao Key Laboratory of Cluster Science Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China

Efficient synthesis of transition metal hydroxides on conductive substrate is essential for enhancing their merits in industrialization of energy storage ***,most of the synthetic routes at present mainly rely on traditional bottom-up method,which involves tedious steps,time-consuming treatments,or additional alkaline media,and is unfavorable for high-efficiency ***,we present a facile,ultrafast and general avenue to synthesize transition metal hydroxides on carbon substrate within 13 s by Joule-heating *** high reaction kinetics caused by the instantaneous high temperature,seven kinds of transition metal-layered hydroxides(TM-LDHs)are formed on carbon ***,the fastest synthesis rate reaches~0.46 cm^(2)s^(-1).Density functional theory calculations further demonstrate the nucleation energy barriers and potential mechanism for the formation of metal-based hydroxides on carbon *** efficient approach avoids the use of extra agents,multiple steps,and long production time and endows the LDHs@carbon cloth with outstanding flexibility and machinability,showing practical advantages in both common and micro-zinc ion-based energy storage *** prove its utility,as a cathode in rechargeable aqueous alkaline Zn(micro-)battery,the NiCo LDH@carbon cloth exhibits a high energy density,superior to most transition metal LDH materials reported so far.

关键词： Ultrafast synthesis Thermal shock Metal-layered hydroxides Zn(micro-)battery

Multifunctional devices based on planar microsupercapacitors:Progress and challenges

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Science China Materials 2022年第12期65卷 3202-3228页

作者： Li Song Xuting Jin Chunlong Dai Yuyang Han Jiatao zhang zhipan zhang Liangti Qu Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of Education of ChinaSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

With the boom of portable,wearable,and implantable smart electronics in the last decade,the demand for multifunctional microscale electrochemical energy storage devices has *** to their excellent rate performance,high power density,long cycling lifetime,easy fabrication,and integration,multifunctional planar microsupercapacitors(PMSCs)are deemed as one of the ideal micropower sources for next-generation flexible on-chip ***,we offer a comprehensive overview of the recent progress regarding multifunctional devices based on PMSCs,including stretchable,self-healing,stimulus-responsive,thermosensitive,biodegradable,and temperaturetolerant *** also emphasize the unique applications of multifunctionally integrated PMSCs in the construction of self-powered and sensor-integrated systems in terms of multifunctional operation ***,the key challenges and future prospects related to these multifunctional devices are discussed to stimulate further research in this flourishing field.

关键词： microsupercapacitors planar devices multifunctionality self-powered integrated systems sensor-integrated system

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激光结构化仿生表面

科学通报 2019年第12期64卷 1238-1253页

作者：韩雨洋张志攀曲良体北京理工大学化学与化工学院北京100081

在优胜劣汰的自然法则下,生物体通过进化实现了对自然环境最大程度的适应性.向自然界生物体学习,研究其表面独特的结构和特异性功能已成为近年来研发新型材料的重要途径之一.其中,结构化仿生表面是复合材料的重要组成部分,已广泛应用于... 详细信息

在优胜劣汰的自然法则下,生物体通过进化实现了对自然环境最大程度的适应性.向自然界生物体学习,研究其表面独特的结构和特异性功能已成为近年来研发新型材料的重要途径之一.其中,结构化仿生表面是复合材料的重要组成部分,已广泛应用于生物工程、航空航天、现代医学、国防、新能源器件及日常生活中.激光法制备结构化仿生表面是以工程仿生学为基础,采用不同激光光源加工样品表面来形成不同表面结构并实现特定性能的技术.本文主要总结了近期国内外激光结构化仿生加工领域的进展,探讨激光加工的结构化仿生表面在减黏降阻及超疏水等方面的应用,并对今后的工作进行展望.

关键词：结构化仿生表面激光加工减黏降阻超疏水

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大金重修唐太宗庙碑刍议

文博 2020年第3期 90-93页

作者：张志攀昭陵博物馆陕西咸阳713200

金代醴泉县(今陕西省礼泉县)遗存宋修唐太宗庙一区。天会十五年(1137),统治关中的元帅右监军完颜氏亲谒该庙,因庙宇几近废毁,下令地方政府重修,竣工后立碑以记其事。本文对醴泉县所留宋修唐太宗庙的缘起及废毁做了探索,否定了下令重修... 详细信息

金代醴泉县(今陕西省礼泉县)遗存宋修唐太宗庙一区。天会十五年(1137),统治关中的元帅右监军完颜氏亲谒该庙,因庙宇几近废毁,下令地方政府重修,竣工后立碑以记其事。本文对醴泉县所留宋修唐太宗庙的缘起及废毁做了探索,否定了下令重修唐太宗庙的完颜氏是完颜宗弼或完颜希尹的观点,论证了完颜氏是完颜撒离喝,并对完颜撒离喝代表金政权对关中文物古迹的保护做了考察。

关键词：金代唐太宗庙碑刻完颜撒离喝文物保护