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Journal of Energy Chemistry 2023年第9期84卷 140-152页

作者： Rin Na Kyeongseok Min Hyejin Kim yujin son Sang Eun Shim Sung-Hyeon Baeck Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy Materials and ProcessInha UniversityIncheon 22212Republic of Korea

Herein,a facile synthetic strategy is proposed to fabricate high-performance electrocatalysts for rechargeable Zn-air batteries(ZABs).Heterostructured NiCo/NiCo_(2)S_(4) nanoparticles encapsulated in N-,S-co-doped CNT(NiCo/NiCo_(2)S_(4)@NSCNT) are synthesized via co-precipitation,thermal carbonization,and partial sulfidation *** strongly coupled NiCo/NiCo_(2)S_(4) heterostructure can improve the redox property and charge transfer ***,the CNTs with abundant foreign dopants provide high electrical conductivity and abundant defect sites for both the oxygen evolution reaction(OER) and oxygen reduction reaction(ORR).The prepared NiCo/NiCo_(2)S_(4)@NSCNT electrocatalyst exhibits a low overpotential of 349 mV at a current density of 10 mA cm-2 and a half-wave potential of 0.865 V for the OER and ORR,***,the ZAB assembled using as-prepared NiCo/NiCo_(2)S_(4)@NSCNT can provide superior specific capacity(756.16 mA h g_(Zn)^(-1)],peak power density(155.82 mW cm^(-2)),and long-term cyclability compared to those of the precious metal-based electrocatalyst(Pt/C+RuO_(2)).

关键词： Bifunctional electrocatalyst NiCo alloy Bimetallic sulfide Heterojunction Zinc–air battery

Analysis of Differences in Electrochemical Performance Between Coin and Pouch Cells for Lithium-Ion Battery Applications

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Energy & Environmental Materials 2024年第3期7卷 59-63页

作者： Yeonguk son Hyungyeon Cha Taeyong Lee yujin Kim Adam Boies Jaephil Cho Michael De Volder Department of Engineering University of Cambridge17 Charles Babbage RoadCB30FSCambridge UK Department of Chemical Engineering Changwon National UniversityChangwon Gyeongsangnam-do 51140Korea Department of Energy Engineering School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST) Ulsan 44919Korea

Small coin cell batteries are predominantly used for testing lithium-ion batteries(LIBs)in academia because they require small amounts of material and are easy to ***,insufficient attention is given to difference in cell performance that arises from the differences in format between coin cells used by academic researchers and pouch or cylindrical cells which are used in *** this article,we compare coin cells and pouch cells of different size with exactly the same electrode materials,electrolyte,and electrochemical *** show the battery impedance changes substantially depending on the cell format using techniques including Electrochemical Impedance Spectroscopy(EIS)and Galvanostatic Intermittent Titration Technique(GITT).Using full cell NCA-graphite LIBs,we demonstrate that this difference in impedance has important knock-on effects on the battery rate performance due to ohmic polarization and the battery life time due to Li metal plating on the *** hope this work will help researchers getting a better idea of how small coin cell formats impact the cell performance and help predicting improvements that can be achieved by implementing larger cell formats.

关键词： coin cell full cell lithium-ion batteries pouch cell

Forest structure and carbon dynamics of an intact lowland mixed dipterocarp forest in Brunei Darussalam

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Journal of Forestry Research 2018年第1期29卷 199-203页

作者： Sohye Lee Jongyeol Lee Seongjun Kim yujin Roh Kamariah Abu Salim Woo-Kyun Lee Yowhan son Department of Environmental Science and Ecological Engineering Graduate School Korea University Environmental and Life Sciences Faculty of ScienceUniversiti Brunei Darussalam Department of Biological of Environmental Sciences Qatar University

Tropical forests play a critical role in mitigating climate change because they account for large amount o terrestrial carbon storage and ***,there are many uncertainties associated with the estimation o carbon *** estimated forest structure and carbon dynamics along a slope（17.3°–42.8°）and to assess the relations between forest structures,carbon dynamics,and slopes in an intact lowland mixed dipterocarp forest,in Kuala Belalong,Brunei *** biomass,basa area,stand density,crown properties,and tree family composition were measured for forest *** rate,litter production,and litter decomposition rates were also measured for carbon *** crown form index and the crown position index were used to assess crown properties,which we categorized into five stages,from very poor to *** living biomass,basal area and stand density were 261.5–940.7 Mg ha-1,43.6–63.6 m2ha-1and 6,675–8400 tree ha-1,*** average crown form and position index were 4,which means that the crown are mostly symmetrical and sufficiently exposed for *** mean biomass growth rate,litter production,litter decomposition rate were estimated as11.9,11.6 Mg ha-1a-1,and 7.2 g a-1,*** growth rate was significantly correlated with living biomass,basal area,and crown *** form appeared to strongly influence living biomass,basal area and biomass growth rate in terms of light ***,basal area,stand density,crown properties,and biomass growth rate did not vary by slope or tree family *** results indicate that carbon accumulation by tree growth in an intact lowland mixed dipterocarp forest depends on crown *** of any effect of tree family composition on carbon accumulation suggests that the main driver of biomass accumulation in old-growth forests of Borneo is not species-specific characteristics of tree species.

关键词： Carbon dynamics Growth rate Litter flux Lowland mixed dipterocarp forest Slope

Optimization of ultrasonic-assisted freezing of Penaeus chinensis by response surface methodology

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Food Quality and Safety 2021年第2期5卷 143-151页

作者： Yubin Ying Yingchun Xiang Jialin Liu Xin Chen Lingping Hu yujin Li Yaqin Hu College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingIntegrated Research Base of Southern Fruit and Vegetable Preservation TechnologyZhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality ControlNingbo Research InstituteFuli Institute of Food ScienceZhejiang UniversityHangzhouChina College of Food Science and Technology Hainan Tropical Ocean UniversitySanyaChina College of Food Science and Engineering Ocean University of ChinaQingdaoChina

Objectives:Optimization of ultrasonic-assisted freezing of Penaeus chinensis by response surface methodology was studied in order to(1)obtain frozen Penaeus chinensis of high quality and(2)provide practical guidance for the application of ultrasonic-assisted freezing in Penaeus *** and Methods:Three independent and major variables were selected,including initial ultrasonic temperature(℃),ultrasonic power(W)and ultrasonic time(s on/2 s off).On the basis of one-factor experiments,17 groups of experiments were established by response surface methodology according to Box-Behnken *** multiple regression analysis the experimental data were fitted into a second-order polynomial equation,which was tested by proper statistical ***:The optimal ultrasonic conditions were as follows:initial ultrasonic temperature 0℃,ultrasonic power 180 W,ultrasonic time 5 son/2 s *** the optimization conditions,the time of passing through maximum ice crystal generation zone was 105.500 s,which was very close to the predictive passage time of 101.541 ***:Initial ultrasonic temperature,ultrasonic time and ultrasonic power played an important role in the process of ultrasonic-assisted freezing of Penaeus *** surface methodology was used to optimize the three factors in ultrasonic-assisted freezing,which could greatly shorten the time of passing through the maximum ice crystal generation zone and maintain the tissue structure of Penaeus chinensis well.

关键词： Ultrasonic-assisted freezing Penaeus chinensis response surface methodology time of passing through the maximum ice crystal generation zone optimization

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转移性非小细胞肺癌患者不同生存期预后分析

中国现代医生 2013年第19期51卷 10-12,51页

作者：史国栋徐裕金孙晓江狄小云单国平浙江省肿瘤医院放疗科浙江杭州310022

目的通过比较晚期非小细胞肺癌不同生存期的患者一般特征，分析影响晚期非小细胞肺癌的长期生存的因素。方法回顾性分析浙江省肿瘤医院2005～2010年初诊为晚期非小细胞肺癌的251例患者。对生存期〈6个月与生存期〉2年的两组患者年龄、... 详细信息

目的通过比较晚期非小细胞肺癌不同生存期的患者一般特征，分析影响晚期非小细胞肺癌的长期生存的因素。方法回顾性分析浙江省肿瘤医院2005～2010年初诊为晚期非小细胞肺癌的251例患者。对生存期〈6个月与生存期〉2年的两组患者年龄、性别、吸烟、病理分型、治疗方法、TN分期、转移部位数、PS评分、是否脑转移、并发症等方面进行Logistic回归分析。应用Kaplan-Meier法及Log-rank检验进行生存比较。COX多因素分析对全组251例患者进行多因素分析。结果251例患者中位生存时间为10．48个月，1年生存率、2年生存率、5年生存率分别为17．53％、10．4％、2．79％。共44例（17．53％）患者生存期超过2年，其中超过5年的患者为7例（2．79％），74例（29．48％）患者生存期短于6个月。生存期〈6个月与〉2年的患者在性别、病理、治疗方法、N分期、转移部位数、PS评分、脑转移方面差异具有显著性。COX多因素分析显示，淋巴结转移为NO或N1（P=0．000），PS评分为0～1（P=0．000），多学科治疗（P=0．01），单发肺内或骨转移（聘0．00），非吸烟（P=-0．019）是患者长期生存的有利因素。结论淋巴结转移为NO或N1、PS评分为0-1、单一肺内或骨转移、接受多种治疗方法、女性、腺癌可能作为预测晚期非小细胞肺癌长期生存的因素。

关键词：非小细胞肺癌转移性长期生存预后因素