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Chinese Chemical Letters 2023年第1期34卷 59-72页

作者： Xinxing Sun shuangke liu Weiwei Sun Chunman Zheng College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China

Lithium-sulfur(Li-S)battery has been considered as one of the most promising next generation energy storage technologies for its overwhelming merits of high theoretical specific capacity(1673 m Ah/g),high energy density(2500 Wh/kg),low cost,and environmentally friendliness of ***,critical drawbacks,including inherent low conductivity of sulfur and Li2S,large volume changes of sulfur cathodes,undesirable shuttling and sluggish redox kinetics of polysulfides,seriously deteriorate the energy density,cycle life and rate capability of Li-S battery,and thus limit its practical ***,we reviewed the recent developments addressing these problems through iron-based nanomaterials for effective synergistic immobilization as well as conversion reaction kinetics acceleration for *** mechanist configurations between different iron-based nanomaterials and polysulfides for entrapment and conversion acceleration were summarized at *** we concluded the recent progresses on utilizing various iron-based nanomaterials in Li-S battery as sulfur hosts,separators and cathode ***,we discussed the challenges and perspectives for designing high sulfur loading cathode architectures along with outstanding chemisorption capability and catalytic activity.

关键词： Iron-based nanomaterials Polysulfides Chemical anchoring Electrocatalyst Lithium-sulfur batteries

Catalytic Co9S8 decorated carbon nanoboxes as efficient cathode host for long-life lithium-sulfur batteries

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Nano Research 2020年第8期13卷 2143-2148页

作者： Weiwei Sun Yujie Li shuangke liu Qingpeng Guo Yuhao Zhu Xiaobin Hong Chunman Zheng Kai Xie College of Aerospace Science and Engineering National University of Defense TechnologyChangsha410073China

Lithium sulfur(Li-S)batteries with high specific capacity and energy density can bring enormous opportunities for the nextgeneration energy storage ***,the severe dissolution and shuttle effect of lithium polysulfides(LiPSs)is still the key issue that seriously impedes the development of practical Li-S ***,polar Co9S8 inlaid carbon nanoboxes(Co9S8@C NBs)have been investigated as cathode host for high-performance Li-S *** this integrated structure,Co9S8 nanocrystals not only provide strong chemisorptive capability for polar LiPSs,but also act as a catalyst to accelerate polysulfide redox reactions;while carbon nanobox with large inner space can offer enough space to relieve the volume expansion and physically confine LiPSs’*** a result,the S/Co9S8@C NBs cathode exhibits high specific capacity at 1C and the capacity retention was^83%after 400 cycles,corresponding to an average decay rate of only^0.043%per cycle.

关键词： Co9S8@C cathode host shuttle effect catalyst Li-S batteries

Progress on Space Materials Science in China:Debris Shielding Fibrous Materials and High Specific Energy Lithium Sulfur Batteries

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空间科学学报 2022年第4期42卷 803-811页

作者： WU Nan liu shuangke ZHANG Xiaoshan SUN Weiwei ZHENG Chunman WANG Yingde College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073

The development of China’s space industry puts forward urgent requirements for high-performance debris shielding materials and high energy density rechargeable *** this review,the recent progress on debris shielding fibrous materials and high energy density Li-S battery are particularly *** to the experimental results,basalt fibers and silicon carbide fibers were chosen as the effective filling shielding *** geometric structure of fabrics was also *** the novel shielding materials,high-strength and flexible silicon carbide micro-nano fibrous membranes were designed and *** obtained membranes with excellent mechanical properties portend the potential applications in debris protection ***,the high specific energy lithium sulfur batteries have made remarkable progress in fundamental research and application research in recent *** order to solve the key problems of polysulfides shuttle and slow redox kinetics in lithium sulfur battery,a series of transition metal compound@hollow carbon-based material as sulfur host with dual functions of catalysis and adsorption towards polysulfides were designed and *** obtained Li-S pouch cells with high areal sulfur loading of 6.9 mg·cm^(-2)yield exceptional high practical energy density of 382 W·h·kg^(-1)under lean electrolyte of 3.5μL·mg^(-1),demonstrating the great potential of realistic high-energy Li-S batteries.

关键词： Space materials Silicon carbide fibers Debris shielding Li-S battery

Tailoring polysulfide trapping and kinetics by engineering hollow carbon bubble nanoreactors for high-energy Li-S pouch cells

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Nano Research 2021年第5期14卷 1355-1363页

作者： Lei Wang shuangke liu Jin Hu Xianan Zhang Xin Li Guanhua Zhang Yujie Li Chunman Zheng Xiaobin Hong Huigao Duan National Engineering Research Center for High Efficiency Grinding College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China College of Aerospace Science and Engineering National University of Defense TechnologyChangsha410073China School of Mechatronics Engineering and Automation Foshan UniversityFoshan528225China

Despite great progress of lithium-sulfur(Li-S)battery performance at the laboratory-level,both key parameters and challenges at cell scales to achieve practical high energy density require high-sulfur-loading cathodes and lean ***,a novel carbon foam integrated by hollow carbon bubble nanoreactors with ultrahigh pore volume of 6.9 cm3·g−1 is meticulously designed for ultrahigh sulfur content up to 96 wt.%.Tailoring polysulfide trapping and ion/electron transport kinetics during the charge-discharge process can be achieved by adjusting the wall thickness of hollow carbon *** a further in-depth understanding of electrochemical reaction mechanism for the cathode is impelled by the in-situ Raman *** a result,the as-prepared cathode delivers high specific capacitances of 1,269 and 695 mAh·g−1 at 0.1 and 5 C,***,Li-S pouch cells with high areal sulfur loading of 6.9 mg·cm−2 yield exceptional practical energy density of 382 Wh·kg−1 under lean electrolyte of 3.5µL·mg−1,which demonstrates the great potential for realistic high-energy Li-S batteries.

关键词： hollow carbon bubble nanoreactors ultrahigh pore volume tunable wall thickness high energy density lithium-sulfur batteries

Cobalt and Nitrogen Co-Doped Nano-Porous Carbon: Synthesis and Application for Lithium-Sulfur Battery

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Journal of Power and Energy Engineering 2017年第12期5卷 16-20页

作者： Shiqiang Luo Chunman Zheng Yujie Li shuangke liu College of Aerospace Science and Engineering National University of Defense Technology Changsha China

S@C-Co-N nanoporous carbon co-doped with cobalt and nitrogen as the cathode of lithium-sulfur battery are prepared. The synthetic route is carried out via the carbonization of metal organic frameworks polyhedron ZIF-67, followed by the heat treatment with sulfur. The SEM images suggest that C-Co-N composite maintains almost the same size and polyhedron shape of ZIF-67. The XRD pattern confirms the existence of cobalt element. As cathode for lithium-sulfur battery, the S@C-Co-N composite delivers a reversible capacity of 916.6 mAh?g?1 at the initial cycle and 460.5 mAh?g?1 after 500 cycles at 0.5 C, with a capacity fading of 0.09% per cycle.

关键词： Metal-Organic Frameworks Lithium-Sulfur Battery Cathode

分层型水库取水水温量纲分析及其影响因素研究

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水利学报 2017年第9期48卷 1030-1038页

作者：郑铁刚刘之平孙双科柳海涛牛志攀李广宁中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 四川大学水力学与山区河流开发保护国家重点实验室四川成都610065 中国三峡建设管理有限公司四川成都610023

水温分层作为影响库区水生生态系统的重要因素逐渐成为研究热点。影响下泄水温的主要因素包括:坝前水温梯度、取水水头、取水流量、取水口宽度、温跃层厚度、重力加速度等。通过量纲分析法,基于π定理尝试建立了溢流式分层取水下泄水温... 详细信息

水温分层作为影响库区水生生态系统的重要因素逐渐成为研究热点。影响下泄水温的主要因素包括:坝前水温梯度、取水水头、取水流量、取水口宽度、温跃层厚度、重力加速度等。通过量纲分析法,基于π定理尝试建立了溢流式分层取水下泄水温估算模型。采用SAS 9.3统计软件对实验数据进行了回归分析,提出了下泄水温估算方程,相关系数达到95.6%。研究结果表明,水温梯度项为下泄水温估算的最主要因素,其次为取水水头项,最后为流量项;随着坝前水温温跃层强度增大,下泄水温升高,且强度越大,对下泄水温的影响越显著;下泄水温随取水水头的增加而降低,下泄水温降低幅度明显小于取水水头变幅;当取水流量逐渐增大时,下泄水温逐渐升高,但取水流量大于临界值时,下泄水温转而表现出缓慢下降趋势;在本文研究范围内,估算方程可以用于较好地预测下泄水温,预测结果与实验数据的相关系数为99.4%。

关键词：水温分层下泄水温影响因素估算模型量纲分析法

基于鱼类行为学与水力学的水电站鱼道进口位置选择

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农业工程学报 2016年第24期32卷 164-170页

作者：郑铁刚孙双科柳海涛姜涵李广宁中国水利水电科学研究院流域水循环模拟及调控国家重点实验室北京100038

鱼道进口位置选择属于鱼类行为学与水力学交叉研究范畴,设置的合适与否直接影响鱼道工程的过鱼效果。根据过鱼对象的游泳能力和生活习性,提出了将下游河道内区域划分为鱼道进口优选区域、鱼道进口备选区域及鱼道进口禁布区域的方法和思... 详细信息

鱼道进口位置选择属于鱼类行为学与水力学交叉研究范畴,设置的合适与否直接影响鱼道工程的过鱼效果。根据过鱼对象的游泳能力和生活习性,提出了将下游河道内区域划分为鱼道进口优选区域、鱼道进口备选区域及鱼道进口禁布区域的方法和思路。以某大型水电工程为例,在鱼类行为学基础上,通过对水电站下游流速和流场等水力特性进行分析,结果表明：左岸存在低流速带,鱼类可顺利上溯至尾水渠附近,为鱼道进口主要布置区域;综合生物学指标和水力学指标,利用回流屏障建议将鱼道进口布置于桩号0＋200~0＋210 m范围内;考虑到部分上溯性较强的鱼类,建议在电站发电机组上方布置备用进口。该研究可为水电工程鱼道进口位置选择提供参考。

关键词：水力学流场流速水电工程鱼道进口数值模拟游泳能力

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仿自然鱼道中卵石墙对池室水力特性改善效果

农业工程学报 2017年第15期33卷 184-189页

作者：李广宁孙双科柳海涛张超赵桂侠郑铁刚中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 天津大学水利工程仿真与安全国家重点实验室天津300072

仿自然鱼道是重要的鱼道布置方式之一,其特点是利用当地河床材料构建透水性卵石隔墙,以便更好地模拟出天然河流流态。为了定量分析透水性卵石墙对鱼道水力特性的改善效果,该文针对采用卵石隔墙与不透水隔墙的鱼道水力特性进行对比研究... 详细信息

仿自然鱼道是重要的鱼道布置方式之一,其特点是利用当地河床材料构建透水性卵石隔墙,以便更好地模拟出天然河流流态。为了定量分析透水性卵石墙对鱼道水力特性的改善效果,该文针对采用卵石隔墙与不透水隔墙的鱼道水力特性进行对比研究。结果表明:采用卵石墙的仿自然鱼道,池室内流态丰富,过鱼口处流速分布差异明显,表底流速差达到0.43~0.61 m/s为多种鱼类上溯提供了可能。池室内主流区分布较宽,紊动能较大达0.06~0.12 m2/s2,同时回流区减弱,有利于鱼类找到主流,实现上溯。卵石隔墙的不足之处是鱼道耗水流量相对较大达2.86 m3/s,在工程设计中需要综合考虑卵石墙透水特性与耗水流量之间的平衡关系,找到适宜的布置方案。该研究可为仿自然鱼道的水力设计提供参考。

关键词：鱼道流速流量紊动能耗水流量数值模拟

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改性电解液促进均匀锂沉积的研究进展

材料导报 2023年第6期37卷 1-11页

作者：罗重阳李宇杰王丹琴刘双科陈宇方郑春满国防科技大学空天科学学院长沙410073

随着二次电池的逐渐发展,金属锂为负极的电池体系以其优异的能量密度脱颖而出,但其稳定性和安全性较差的问题亟待解决。电解液作为锂离子在正负极之间传输的载体,决定了锂离子的液相传输过程和迁移速率,同时还会与金属锂负极发生界面反... 详细信息

随着二次电池的逐渐发展,金属锂为负极的电池体系以其优异的能量密度脱颖而出,但其稳定性和安全性较差的问题亟待解决。电解液作为锂离子在正负极之间传输的载体,决定了锂离子的液相传输过程和迁移速率,同时还会与金属锂负极发生界面反应生成固体电解质界面膜(SEI),电解液的组分变化会极大程度上影响SEI膜的组成和结构。电解液改性能够有效调控金属锂沉积过程,是改善金属锂负极电化学性能的重要途径。本文从电解液对锂离子沉积的影响因素出发,分析了液相传质、SEI膜的形成、电荷转移等基本过程对锂离子沉积的调控机理,总结归纳了溶剂分子、锂盐浓度、添加剂等对金属锂沉积过程的影响,介绍了溶剂混用、复合锂盐、局部高浓度电解液、双功能添加剂等电解液改性促进均匀锂沉积的方法,分析了各种改性方法对实现均匀锂沉积的作用机理,并展望了这些方法的发展趋势。

关键词：电解液锂负极枝晶固体电解质界面膜锂沉积锂硫电池锂空气电池

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三种室内颗粒运动分布模拟方法的比较

暖通空调 2007年第4期37卷 7-11页

作者：杨彩青赵彬杨旭东刘双科北京科技大学清华大学

用拉格朗日模型和滑移通量模型及将颗粒当作被动运输标量处理的方法对三维通风小室内颗粒的扩散分布进行了数值模拟,并将模拟结果与相关文献中的实验数据进行了对比。结果表明,用拉格朗日模型模拟的结果除了天花板和入口处附近外与实验... 详细信息

用拉格朗日模型和滑移通量模型及将颗粒当作被动运输标量处理的方法对三维通风小室内颗粒的扩散分布进行了数值模拟,并将模拟结果与相关文献中的实验数据进行了对比。结果表明,用拉格朗日模型模拟的结果除了天花板和入口处附近外与实验数据吻合得都较好;用滑移通量模型模拟的结果在靠近天花板附近与实验数据吻合得较好,其他地方的模拟结果比实验数据稍小;将颗粒当作被动运输标量处理的模拟结果在0.3m以下位置与实验数据吻合得较好,而在靠近天花板附近与实验数据差别较大。

关键词：颗粒分布拉格朗日模型滑移通量模型被动运输标量