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Harness High-Temperature Thermal Energy via Elastic Thermoelectric Aerogels

Nano-Micro Letters 2024年第8期16卷 196-210页

作者： Hongxiong Li Zhaofu Ding Quan Zhou Jun Chen Zhuoxin Liu Chunyu Du lirong liang Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China Department of Bioengineering University of CaliforniaLos AngelesCA 90095USA

Despite notable progress in thermoelectric(TE)materials and devices,developing TE aerogels with high-temperature resistance,superior TE performance and excellent elasticity to enable self-powered high-temperature monitoring/warning in industrial and wearable applications remains a great challenge.Herein,a highly elastic,flame-retardant and high-temperature-resistant TE aerogel,made of poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate)/single-walled carbon nanotube(PEDOT:PSS/SWCNT)composites,has been fabricated,displaying attractive compression-induced power factor enhancement.The as-fabricated sensors with the aerogel can achieve accurately pressure stimuli detection and wide temperature range monitoring.Subsequently,a flexible TE generator is assembled,consisting of 25 aerogels connected in series,capable of delivering a maximum output power of 400μW when subjected to a temperature difference of 300 K.This demonstrates its outstanding high-temperature heat harvesting capability and promising application prospects for real-time temperature monitoring on industrial high-temperature pipelines.Moreover,the designed self-powered wearable sensing glove can realize precise wide-range temperature detection,high-temperature warning and accurate recognition of human hand gestures.The aerogel-based intelligent wearable sensing system developed for firefighters demonstrates the desired self-powered and highly sensitive high-temperature fire warning capability.Benefitting from these desirable properties,the elastic and high-temperature-resistant aerogels present various promising applications including self-powered high-temperature monitoring,industrial overheat warning,waste heat energy recycling and even wearable healthcare.

关键词： Thermoelectrics Aerogel Self-powered High-temperature monitoring High-temperature warning

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Self-assembled aerogel sheet electrodes of thermocells for low-grade heat harvest

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Science China Chemistry 2024年第5期67卷 1672-1679页

作者： Ziwei Mo Shouhao Wei Daibin Xie Kaihua Zhu Hongxiong Li Xin Lu lirong liang Chunyu Du Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

Efficiently harvesting low-grade heat is crucial for sustainable energy management. Thermocells(TECs), inducing heat-toelectricity conversion via the thermogalvanic effect, have thus drawn tremendous attention in recent years. This study introduces a self-assembly approach for fabricating aerogel sheet electrodes(ASEs) tailored for TECs. The crafted ASEs retain a remarkable porous architecture with approximately 95% porosity, even with their slimmed-down thickness. Results reveal that the electrode composition has minimal influence on the thermopower of TECs. Notably, the porous ASE with tunned composition demonstrates an optimal effective surface area for the thermogalvanic effect, resulting in enhanced output current density. This balances the desirable traits of electrode compactness with abundant redox active sites, positioning it favorably against conventional bulky electrode designs. The TECs utilizing the optimized ASE achieve a peak output power of 22.10 μW cm^(-2)under a temperature difference of 30 K. Furthermore, a tubular TEC device is readily assembled and specially designed for harvesting heat energy from hot fluids. These findings underscore the potential of composite electrodes in the realm of low-grade heat harvest, paving the way for broader applications in sustainable energy solutions.

关键词： thermocells low-grade heat harvest energy conversion composite electrodes

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Regulating Thermogalvanic Effect and Mechanical Robustness via Redox Ions for Flexible Quasi‑Solid‑State Thermocells

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Nano-Micro Letters 2022年第5期14卷 153-167页

作者： Peng Peng Jiaqian Zhou lirong liang Xuan Huang Haicai Lv Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China

The design of power supply systems for wearable applications requires both flexibility and durability.Thermoelectrochemical cells(TECs)with large Seebeck coefficient can efficiently convert lowgrade heat into electricity,thus having attracted considerable attention in recent years.Utilizing hydrogel electrolyte essentially addresses the electrolyte leakage and complicated packaging issues existing in conventional liquid-based TECs,which well satisfies the need for flexibility.Whereas,the concern of mechanical robustness to ensure stable energy output remains yet to be addressed.Herein,a flexible quasisolid-state TEC is proposed based on the rational design of a hydrogel electrolyte,of which the thermogalvanic effect and mechanical robustness are simultaneously regulated via the multivalent ions of a redox couple.The introduced redox ions not only endow the hydrogel with excellent heat-to-electricity conversion capability,but also act as ionic crosslinks to afford a dual-crosslinked structure,resulting in reversible bonds for effective energy dissipation.The optimized TEC exhibits a high Seebeck coefficient of 1.43 mV K−1 and a significantly improved fracture toughness of 3555 J m^(−2),thereby can maintain a stable thermoelectrochemical performance against various harsh mechanical stimuli.This study reveals the high potential of the quasi-solid-state TEC as a flexible and durable energy supply system for wearable applications.

关键词： Thermocells Thermoelectric Flexible energy devices Wearable applications Hydrogel electrolytes

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Swift Assembly of Adaptive Thermocell Arrays for Device‑Level Healable and Energy‑Autonomous Motion Sensors

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纳微快报:英文版 2023年第11期15卷 104-118页

作者： Xin Lu Daibin Xie Kaihua Zhu Shouhao Wei Ziwei Mo Chunyu Du lirong liang Guangming Chen Zhuoxin Liu College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

The evolution of wearable technology has prompted the need for adaptive,self-healable,and energy-autonomous energy devices.This study innovatively addresses this challenge by introducing an MXene-boosted hydrogel electrolyte,which expedites the assembly process of flexible thermocell(TEC)arrays and thus circumvents the complicated fabrication of typical wearable electronics.Our findings underscore the hydrogel electrolyte’s superior thermoelectrochemical performance under substantial deformations and repeated self-healing cycles.The resulting hydrogel-based TEC yields a maximum power output of 1032.1 nW under theΔT of 20 K when being stretched to 500%for 1000 cycles,corresponding to 80%of its initial state;meanwhile,it sustains 1179.1 nW under theΔT of 20 K even after 60 cuthealing cycles,approximately 92%of its initial state.The as-assembled TEC array exhibits device-level self-healing capability and high adaptability to human body.It is readily applied for touch-based encrypted communication where distinct voltage signals can be converted into alphabet letters;it is also employed as a self-powered sensor to in-situ monitor a variety of body motions for complex human actions.The swift assembly approach,combined with the versatile functionality of the TEC device,paves the way for future advancements in wearable electronics targeting at fitness monitoring and human–machine interfaces.

关键词： Thermocells Flexible devices Wearable applications Low-grade heat harvest MXenes

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Flexible nanocomposite electrodes with optimized hybrid structure for improved low-grade heat harvest via thermocells

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Science China Chemistry 2023年第6期66卷 1814-1823页

作者： Ziwei Mo Jiaqian Zhou Xin Lu lirong liang Fusheng Liu Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

Thermal energy is ubiquitous and constantly generated in nature and society.Thermocells(TECs)represent a promising energyconversion technology that can directly translate thermal energy into electricity with a large thermopower,thus having attracted considerable attention in recent years.Nevertheless,the use of noble platinum electrodes in TECs has substantially limited their widespread applications,as the scarcity of platinum element increases the cost of materials,and its intrinsic rigidity is not conducive to flexible and wearable applications under heat sources with complex surface geometry.Herein,we propose a facile hybridizing route to constructing flexible electrodes with optimized nanostructures.The flexible composite electrode is fabricated by decorating a single-walled carbon nanotube network with conducting polypyrrole nanospheres through controlled electrochemical deposition.With refined interfacial nanostructures,the resultant composite film can facilitate carrier transport/transfer at the electrolyte-electrode interface,and thereby shows superior overall thermoelectrochemical performance to noble platinum electrode.The TEC employing the flexible composite electrodes yields a maximum output power of 2.555μW under the temperature difference of 30 K,and a device comprising 6 TEC units is assembled to efficiently utilize waste heat and human body heat,revealing the high potential of low-grade heat harvesting.

关键词： nanocomposites thermocells carbon nanotubes polymers

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Effectiveness and Acceptability of a Comprehensive Mobile Health-Based Modality for Smoking Cessation-Beijing Municipality,China,2022

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China CDC weekly 2023年第21期5卷 464-468页

作者： Shuilian Chu Hang Jing Di Zhang Yuan Cao Yunliang Qian Xiurong Liu Lin Xiao Zhaohui Tong lirong liang Department of Research on Tobacco Dependence Therapies Beijing Institute of Respiratory Medicine and Beijing Chao-Yang HospitalCapital Medical UniversityBeijingChina Beijing Center for Disease Prevention and Control BeijingChina Tobacco Control Office Chinese Center for Disease Control and PreventionBeijingChina Department of Respiratory and Critical Care Medicine Beijing Institute of Respiratory Medicine and Beijing Chao-Yang HospitalCapital Medical UniversityBeijingChina

Summary What is already known on this topic?Mobile health interventions have been demonstrated to be effective in aiding smoking cessation among smokers.Nevertheless,research on this topic remains limited in China.What is added by this report?Following two months of utilizing the services of a comprehensive mobile health(mHealth)-based modality(“Way to Quit”modality)which integrated three online interventions through the WeChat application,29.1%of participating smokers successfully quit smoking.Participants who used a greater number of online services were more likely to cease smoking.All services were scored highly for satisfaction among smokers.What are the implications for public health practice?This study presents a practical and feasible method to assist Chinese smokers in quitting smoking.The results of this research suggest a promising direction for enhancing the accessibility and utilization of smoking cessation services.Additionally,these findings serve as a critical reference for addressing the obstacles faced by smoking cessation services in China.

关键词： smoke services utilizing

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中医临床预测模型研究方法学质量的系统评价

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中国循证医学杂志 2024年第3期24卷 312-321页

作者：景城阳冯琳李嘉琛梁立荣廖星中国中医科学院中医临床基础医学研究所循证医学基础研究室北京100700 首都医科大学附属北京朝阳医院北京市呼吸疾病研究所临床流行病学研究室北京100020

目的系统评价中医临床预测模型研究的方法学质量。方法计算机检索PubMed、Embase、Web of Science、CNKI、WanFang Data、VIP和SinoMed数据库,搜集与中医临床预测模型研究相关的文献,检索时限均从建库至2023年3月31日。由2名研究者独立... 详细信息

目的系统评价中医临床预测模型研究的方法学质量。方法计算机检索PubMed、Embase、Web of Science、CNKI、WanFang Data、VIP和SinoMed数据库,搜集与中医临床预测模型研究相关的文献,检索时限均从建库至2023年3月31日。由2名研究者独立筛选文献和提取资料,并基于预测模型偏倚风险评估工具PROBAST评价纳入研究的偏倚风险。结果共纳入113项中医临床预测模型研究(79项诊断模型研究和34项预后模型研究),其中111项(98.2%)研究存在高偏倚风险,各有1项(0.9%)研究为低偏倚风险和偏倚风险不清。统计分析领域被评为高偏倚风险的比例最高,其次是研究对象领域。由于特定研究信息的报告普遍缺失,大量研究在预测因子和预测结局领域中的偏倚风险不清。结论现有中医临床预测模型研究的方法学质量普遍较差,几乎均存在高偏倚风险。产生偏倚风险的原因包括非前瞻性设计的数据来源、结局定义包含预测因子、建模样本量不足、特征选择不合理、性能评估欠准确和内部验证方法错误。未来建模研究需针对模型的设计、构建、评价和验证进行全方位的方法学质量改进,并全面报告模型的所有关键信息,以促进其在医疗实践中的转化应用。

关键词：临床预测模型预测模型研究方法学质量系统评价中医

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中医药领域预测模型研究的可视化分析

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中国实验方剂学杂志 2024年第14期30卷 209-217页

作者：景城阳戴泽琦吴雪张乐梁立荣廖星中国中医科学院中医临床基础医学研究所循证医学基础研究室北京100700 首都医科大学附属北京朝阳医院北京市呼吸疾病研究所北京100020

目的:基于知识图谱对中医药领域预测模型研究进行可视化分析,通过梳理发展历程、总结研究热点及动态趋势,为未来研究方向的挖掘和演化提供参考依据。方法:计算机检索中国知网数据库与Web of Science核心数据库,筛选在2023年2月28日前发... 详细信息

目的:基于知识图谱对中医药领域预测模型研究进行可视化分析,通过梳理发展历程、总结研究热点及动态趋势,为未来研究方向的挖掘和演化提供参考依据。方法:计算机检索中国知网数据库与Web of Science核心数据库,筛选在2023年2月28日前发表的中医药领域预测模型研究文献。采用Endnote X20软件进行文献管理,应用CiteSpace和VOSviewer软件生成知识图谱并对研究的发文量特征、机构合作关系、作者合作网络、共引情况、关键词进行可视化分析。结果:共纳入264篇中文文献和266篇英文文献,研究发文量总体上呈现逐年递增的趋势。发文机构间的合作关系呈现出明显的地域性,其中中医药院校与其附属医院、科研机构下属的二级单位之间的合作关系最为紧密。发表英文文献的研究团队数量及团队成员数量更多、且不同团队间的合作更为频繁。具有开创性意义和(或)借鉴作用的研究被广泛引用与参考;高被引文献主要发表于补充替代医学类期刊和药学类期刊。研究热点主要集中于中医临床预测模型、中药定量模型及具体建模方法。机器学习、深度学习等人工智能技术在中医药研究领域的应用将是未来最为前沿的研究方向。结论:中医药领域对预测模型研究的关注程度正日益增高,多机构、多团队的研究合作模式日趋成为主流。随着多学科交叉融合的不断发展,预测模型研究与新技术/方法的发展与兴起息息相关,任何在理论或应用层面的突破都会带动和引领新一轮的研究热潮。未来需针对特定主题的预测模型开展系统评价研究以提供循证依据。

关键词：中医药预测模型知识图谱可视化分析 CiteSpace VOSviewer

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妊娠期维生素A、D、E表达水平及其临床意义

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右江医学 2024年第1期52卷 64-67页

作者：蒙保山廖晗献梁丽荣林娜广西医大睿谷医学检验有限公司检验科广西南宁530021 广西南宁市妇幼保健院检验科广西南宁530021 广西医大开元埌东医院检验科广西南宁530021

目的探讨妊娠期维生素A、D、E的表达水平及其对不良妊娠结局的预测价值。方法回顾性分析2021年11月至2022年11月于广西医大开元琅东医院行产前检查并分娩的90例孕妇的临床资料。根据妊娠结局分为不良妊娠结局组(不良组,n=37)和正常妊娠... 详细信息

目的探讨妊娠期维生素A、D、E的表达水平及其对不良妊娠结局的预测价值。方法回顾性分析2021年11月至2022年11月于广西医大开元琅东医院行产前检查并分娩的90例孕妇的临床资料。根据妊娠结局分为不良妊娠结局组(不良组,n=37)和正常妊娠结局组(正常组,n=53)。收集妊娠期间相关临床资料,采用logistic回归分析影响不良妊娠结局的危险因素,采用受试者工作特征曲线(ROC)评价维生素A、D、E水平对不良妊娠结局的预测价值。结果Logistic回归分析显示高水平的维生素A、D、E是不良妊娠的保护因素(P<0.05);维生素A、D、E预测不良妊娠结局的AUC分别为0.691、0.797、0.784;三者联合预测妊娠不良结局的AUC为0.906,敏感度为81.08%,特异度为83.02%。结论维生素A、D、E联合使用在孕妇不良妊娠结局的预测中具有较高的指导价值,可为医护人员识别不良妊娠的风险人群提供参考。

关键词：妊娠期维生素A 维生素D 维生素E 妊娠结局

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湿地松太空诱变育种及优株选择

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湖南林业科技 2024年第2期51卷 44-48页

作者：付利张国君梁丽容翁文源龚细娟湖南茂源林业有限责任公司湖南岳阳414000

为缩短湿地松良种选育周期,探索湿地松种子太空诱变育种效果,湖南茂源林业有限责任公司将600粒湿地松0-1027号优良家系种子搭载“神州八号”飞船,经过16 d共397 h太空辐射诱变后,与600粒对照种子一起播种育苗,获得太空诱变苗268株,对照... 详细信息

为缩短湿地松良种选育周期,探索湿地松种子太空诱变育种效果,湖南茂源林业有限责任公司将600粒湿地松0-1027号优良家系种子搭载“神州八号”飞船,经过16 d共397 h太空辐射诱变后,与600粒对照种子一起播种育苗,获得太空诱变苗268株,对照苗358株,造林后连续9年对其生长性状进行调查与分析。结果表明:造林第9年,诱变组单株材积高于对照组单株材积均值的有76株,高于对照组单株材积最大值的有12株。共选择出7株湿地松优良变异株,其单株材积、胸径、树高较对照组均值分别大110.5%~139.4%、28.7%~41.1%、25.7%~41.5%,较对照组最大值分别大18.9%~33.9%、2.6%~12.5%、1.1%~22.7%。

关键词：湿地松太空诱变育种优株选择

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