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Porous CoF2 Spheres Synthesized by a One-Pot Solvothermal Method as High Capacity Cathode Materials for Lithium-Ion Batteries

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Chinese Journal of Chemistry 2017年第1期35卷 48-54页

作者： Qun Guan jianli cheng Xiaodong Li Bin Wang Institute of Chemical Materials China Academy of Engineering Physics Mianyang Sichuan 621900 China Sichuan R &D Center of New Materials Mianyang Sichuan 621900 China

Up to now, there are rare reports of CoF2 spheres used as high capacity cathode materials. Herein, porous CoF2 spheres were synthesized and studied as cathode materials for LIBs. The porous CoF2 spheres were synthesized by a facile one-pot solvothermal method using a safe and inexpensive ammonium fluoride as the fluorine sources. The nature of the synthesis can avoid using corrosive fluorine sources and additional high-temperature thermal treatment The structure, morphologies and electrochemical performance of the samples obtained at different reaction times and solvothermal temperatures were investigated. The results show that the CoF2 spheres obtained at 200 ℃ for 20 h show better electrochemical performances, including a high initial discharge capacity, good capacity retention and high Coulombic efficiency. It can deliver a high initial discharge capacity of 537.8 mAoh·g-1 and keep 127.4 mA·h.g- 1 after 30 cycles used as cathode materials for lithium-ion batteries. The good electrochemical performances may be attributed to good crystallinity, porous structure and relatively intermediate sphere size.

关键词： CoF2 sphere solvothermal method cathode materials lithium-ion battery

Copper Indium Sulfide Enables Li-CO_(2)Batteries with Boosted Reaction Kinetics and Cycling Stability

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Energy & Environmental Materials 2023年第5期6卷 372-380页

作者： Lin Chen Jingwen Zhou Junxiang Zhang Guicai Qi Bin Wang jianli cheng Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China Yangtze Delta Region Institute Institute of Fundamental and Frontiers SciencesUniversity of Electronic Sciences and Technology of ChinaHuzhou 313001China Institute of Fundamental and Frontiers Sciences University of Electronic Sciences and Technology of ChinaChengdu 611731China Department of Chemistry City University of Hong KongKowloon Hong Kong China

High energy density Li-CO_(2)batteries have attracted much attention owing to the"two birds with one stone"feature in fixing greenhouse gas CO_(2)and providing renewable ***,poor reversibility of the discharge product Li_(2)CO_(3)is one of the main problems that limit its application,resulting in poor cycling stability and severe ***,copper indium sulfide(CIS),a semiconducting non-precious metal sulfide,is fabricated as cathode catalysts for high-performance Li-CO_(2)*** with the synergistic effect of bimetallic valence bonding and coordinated electron transfer,Li-CO_(2)batteries using CIS cathodes exhibit high full specific discharge capacity,excellent rate capability and cycle stability,namely it delivers a high specific full discharge capacity of 8878μAh cm^(-2),runs steadily from 10 to 100μA cm^(-2),and performs a stable long-term cycling behavior(>1050 h)under a high energy efficiency of 84%and a low charge voltage of approximately 3.4 V at 20μA cm^(-2)within 100μAh cm^(-2).In addition,a flexible Li-CO_(2)pouch cell is constructed to reveal the potential of employing CIS to fabricate flexible high energy storage devices in practical *** work shows a promising development pathway toward next-generation sustainable energy storage devices.

关键词： copper indium sulfides cycling stability Li-CO_(2)batteries reaction kinetics

Bifunctional Shared Fibers for High‑Efficiency Self‑Powered Fiber‑Shaped Photocapacitors

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Advanced Fiber Materials 2023年第1期5卷 130-137页

作者： Chuan He jianli cheng Chunhui Wu Bin Wang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Institute of Chemical Materials China Academy of Engineering PhysicsChengdu 621900China

Fiber-shaped photocapacitors(FPCs)based on shared bifunctional fiber electrodes for supercapacitors and solar cells hold great potential for the realization of self-powered systems for flexible wearable ***,the reported electrodes for FPCs still face certain limitations,such as limited specific energy density,low total photochemical–electric energy conver-sion efficiency(ηtotal),and poor ***,hollow fibers consisting of partially reduced graphene oxide and a highly conductive polymer are assembled by wet-spinning and employed as shared bifunctional fibers to fabricate self-powered ***,the FPCs achieve high flexibility and aηtotal of 4.2%.This study illustrates a feasible way to design high-performance FPCs and their applications in flexible electronics.

关键词： Photocapacitors Fiber electrodes Supercapacitors Solar cells Total efficiency

FreestandingMo_(3)N_(2) nanotubes for long-term stabilized 2e−intermediate-based high energy efficiency Li-CO_(2) batteries

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SusMat 2023年第2期3卷 276-288页

作者： Guicai Qi Junxiang Zhang jianli cheng Bin Wang Institute of Chemical Materials China Academy of Engineering PhysicsChengduChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina

Li–CO_(2) batteries are considered one of the promising power sources owing to ultrahigh energy density and carbon ***,the sluggish reaction kinetics of 4e−discharged process(Li_(2)CO_(3))impede its potential *** of the efficient strategies for developing cathode catalysts is to stabilize 2e−intermediate Li_(2)C_(2)O_(4) and improve reaction ***,longterm catalysts of stabilized Li_(2)C_(2)O_(4) are barely achieved,whereas cycle stability is far from satisfactory ***,non-noble metal–based Mo_(3)N_(2) is synthesized and employed as freestanding cathodes for Li–CO_(2) *** to rich delocalized electrons of Mo^(2+)and reversible electron localization structure,freestanding Mo_(3)N_(2) cathodes exhibit a low charge potential(3.28 V)with an ultralow potential gap(0.64 V),high energy efficiency of up to 80.46%,fast rate capability,and outstanding cycle stability(>910 h).In situ experiments and theoretical calculation verify that Mo_(3)N_(2) stabilizes 2e−Li_(2)C_(2)O_(4) intermediate by the interaction of Mo^(2+)as active sites where Mo^(2+)promotes the transfer of outer electrons to O,prevents its disproportionation to Li_(2)CO_(3),and promotes reaction kinetics,contributing to high energy efficiency and outstanding cycle *** addition,the pouch-cells deliver ultrahigh energy density of up to 6350.7W h kg^(−1) based on the mass of cathode materials.

关键词： carbon-free freestanding high energy efficiency Li-CO_(2)batteries Mo_(3)N_(2)nanotubes

劳动教育:人全面发展的重要场域——卢梭自然主义劳动教育思想评析

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天津师范大学学报（社会科学版） 2021年第2期41卷 54-59页

作者：郭志明成建丽天津师范大学教育学部天津300387 北京一诺培优教育咨询有限公司

卢梭强调劳动的教育价值,认为劳动是一种特殊的教育形式。青少年儿童应该在朴素的环境中成长,要学会劳动。劳动教育与智育同步,是品德养成、自由地发展其天赋个性的重要场域。选择性的劳动有助于培养身心和谐发展的社会人。卢梭的劳动... 详细信息

卢梭强调劳动的教育价值,认为劳动是一种特殊的教育形式。青少年儿童应该在朴素的环境中成长,要学会劳动。劳动教育与智育同步,是品德养成、自由地发展其天赋个性的重要场域。选择性的劳动有助于培养身心和谐发展的社会人。卢梭的劳动教育思想体现出自然主义教育家对人的发展的思考,是人全面发展理论的渊源之一。

关键词：卢梭《爱弥儿》劳动教育自然主义教育

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芜湖市少儿跳水运动员科学选材的探讨

安徽体育科技 2013年第4期34卷 55-57页

作者：陈建莉芜湖市青少年体育学校安徽芜湖241000

少儿跳水运动员的科学选材正确对今后能否成为优秀选手有着直接的关系。从形体、素质、心理、遗传、机能等方面为应具备的基本因素,对少儿跳水运动员进行科学选材,并对血红蛋白、平衡能力、视力、时空感觉,以及手臂力量、下肢爆发力、... 详细信息

少儿跳水运动员的科学选材正确对今后能否成为优秀选手有着直接的关系。从形体、素质、心理、遗传、机能等方面为应具备的基本因素,对少儿跳水运动员进行科学选材,并对血红蛋白、平衡能力、视力、时空感觉,以及手臂力量、下肢爆发力、腰腹力量、空翻速度、灵敏协调性等各项指标的特征和标准的范围进行探讨,旨在为少儿跳水运动员选材和训练提供了科学依据。

关键词：少儿运动员跳水项目科学选材

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高层住宅建筑基础结构设计要点分析

工程设计与施工 2024年第8期6卷 109-111页

作者：程建立天津市宏亚工程咨询有限公司天津300000

建筑行业发展环节,随着建筑工艺的进步,高层建筑逐渐成为建筑行业的发展方向。相较于传统的建筑工程来说,高层建筑的规模更大,技术要求更高所以实际施工环节,高层建筑的基础结构设计要求就较高,就需要相关人员结合实际发展的需要,对基... 详细信息

建筑行业发展环节,随着建筑工艺的进步,高层建筑逐渐成为建筑行业的发展方向。相较于传统的建筑工程来说,高层建筑的规模更大,技术要求更高所以实际施工环节,高层建筑的基础结构设计要求就较高,就需要相关人员结合实际发展的需要,对基础结构设计的要点进行分析,阐述施工难点以及必要性,并且制定设计策略。论文就从住宅建筑入手,分析高层住宅建筑基础设计的要求,阐述施工难点,并且制定针对性的解决策略。

关键词：高层建筑基础结构施工技术质量管控

基于优化迭代的浅薄稠油油藏蒸汽驱优势通道预测方法——以春风油田排612区块N_(1)s_(1)^(2)小层为例

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山东石油化工学院学报 2023年第1期37卷 67-71页

作者：程建莉中国石化胜利油田分公司勘探开发研究院山东东营257000

针对已有的汽驱优势通道识别方法存在利用地质信息量少、定性解释主观因素重导致预测效果差的问题,提出一种基于优化迭代的浅薄稠油油藏蒸汽驱优势通道预测方法。该方法通过厘定蒸汽驱优势通道发育关键地质控制因素,采集各生产井静态地... 详细信息

针对已有的汽驱优势通道识别方法存在利用地质信息量少、定性解释主观因素重导致预测效果差的问题,提出一种基于优化迭代的浅薄稠油油藏蒸汽驱优势通道预测方法。该方法通过厘定蒸汽驱优势通道发育关键地质控制因素,采集各生产井静态地质特征参数,建立带有约束的优化方程,基于拉格朗日乘数法理论,求解分类中心及评估矩阵表达式;采用优化迭代思想,不断更新分类中心及评估矩阵,使目标函数达到最小、分类中心及评估矩阵达到最佳,并根据评估矩阵系数最大值确定各生产井汽驱优势通道的分类类别。该方法可对浅薄稠油油藏蒸汽驱优势通道给出有效预测及客观评价,提高汽驱开发效率、防止蒸汽过早发生汽窜,为制定合理的蒸汽驱开发方案提供重要理论依据。

关键词：浅薄稠油油藏蒸汽驱优势通道分类评价优化迭代

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高分辨率层序地层学在录井随钻对比中的应用

特种油气藏 2018年第2期25卷 31-36页

作者：王健程建莉戴荣东肖建洪郝金克中国石化胜利油田分公司山东东营257000

针对胜利油田东部井区受开发方式调整和油藏类型等因素影响,导致录井现场地层划分与对比难以满足精细勘探开发需求的问题,基于高分辨率层序地层学理论,对正钻井进行高分辨率层序随钻地层对比,将沙四上亚段划分为1个长期、3个中期、6个... 详细信息

针对胜利油田东部井区受开发方式调整和油藏类型等因素影响,导致录井现场地层划分与对比难以满足精细勘探开发需求的问题,基于高分辨率层序地层学理论,对正钻井进行高分辨率层序随钻地层对比,将沙四上亚段划分为1个长期、3个中期、6个短期基准面旋回,从而建立了研究区的高分辨率等时地层格架,实现了地层层序的等时划分与对比。研究表明:中期基准面旋回的变化控制了砂体的叠加样式及横向展布,有利于录井现场地层的划分与对比;短期旋回基准面的升降变化控制了砂体的类型,是预测油气层位置的重要依据。研究结果对胜利油区地层分析和界面卡取等有一定的理论和实际指导意义。

关键词：录井高分辨率层序地层学基准面随钻地层对比