Improved lithium storage performance of CeO2-decorated SrLi2Ti6O14 material as an anode for Li-ion battery

Ying Li,Hong-Yan Liu,Ling-Na Shi,Yan-Rong Zhu,Ting-Feng Yi 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-

In this work, the CeO2-decorated SrLi2Ti6O14 anode was successfully prepared through a solid-state process. The space-charge effect induced by the internal adsorption of ions on the CeO2 surface can easilyresult in a formation of an excellent conductive interfacial layer between CeO2 and SrLi2Ti6O14. The goodelectrical contact between CeO2 and SrLi2Ti6O14 offers more active sites for the electrolyte storage andredox reaction, and promotes the intercalation/deintercalation of lithium ions, and thus improves therate performance and cycle stability. Due to its unique structure and composition, the CeO2-decoratedSrLi2Ti6O14 composites exhibit high reversible capacities, good cycle performance and outstanding rateperformance. Especially, the CeO2 (5 wt%)-decorated SrLi2Ti6O14 anode shows the most excellent electrochemicalperformance, which delivers a large charge capacity of 121.3 mAh g 1 and a capacity retentionof 94.48% after 100 cycles at 0.5 A g 1. However, the corresponding charge capacity and capacity retentionof pristine SrLi2Ti6O14 are 100.5 mAh g 1 and 86.77%, respectively. The CeO2(5 wt%)-decoratedSrLi2Ti6O14 with enhanced rate capacity, cycle stability and structural stability is a potential electrodematerial candidate for Li-ion battery.

Research on Li0.3Na0.18K0.52NO3 promoted Mg20Al-CO3 LDH/GO composites for CO2 capture

Ying Yang,Kai Chen,Liang Huang,Min Li,Taiping Zhang,Mi Zhong,Ping Ning,Junya Wang,Shikun Wen 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-

It has been reported that the addition of graphene oxide (GO) can increase the dispersion and heterogeneousnucleation of layered double hydroxide (LDH), thus providing more active sites, which is more conduciveto CO2 adsorption. Herein, we reported alkali metal nitrates ((Li0.3Na0.18K0.52)NO3) promoted LDHand GO composites (LDH/GO) as adsorbents for CO2 capture. The influence of mass ratio of LDH to GO, theimpregnation ratio of alkali metal nitrates, the calcination and adsorption temperature, as well as thecycling stability were investigated systematically. The results indicated that the CO2 capture capacityof LDH/GO composite with 30 mol% (Li0.3Na0.18K0.52)NO3 could reach 4.51 mmol g 1, which was 5.86times higher than LDH/GO1 without loading alkali metal nitrates. Moreover, it had outstanding CO2adsorption capacity in the range from 200 C to 320 C. In addition, the cyclic adsorption and desorptiontest manifested that the CO2 uptake of the material can reach 3.07 mmol g 1 after 22 cycles. We believethat this study will give a significant contribution to fabrication of LDH based composites as CO2 adsorbentsin future study.

Evolution of the effect of sulfur confinement in graphene-based porous carbons for use in Li-S batteries

Jia, Xiangling,Zhang, Chen,Liu, Juanjuan,Lv, Wei,Wang, Da-Wei,Tao, Ying,Li, Zhengjie,Zheng, Xiaoyu,Yu, Jong-Sung,Yang, Quan-Hong The Royal Society of Chemistry 2016 Nanoscale Vol.8 No.8

<P>A controllable drying strategy is proposed for the precise and non-destructive control over the structure of a 3D graphene assembly. Such an assembly is used as a model carbon material to investigate the pore structure-dependent shuttle effect and cycling performance of the cathode of a Li-S battery.</P>

양생조건에 따른 고강도 콘크리트의 건조수축 및 자기수축에 관한 실험연구

이영화,윤종문,김화중 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

High-strength concrete is used in high rise building effectively but it has cracks due to the autogenous shrinkage. Therefore we performed a variety of experiments to analyze the characteristic of the autogenous and drying shrinkage of High-Strength concrete with the temperature and humidity in curing conditions. We measured the length change rate of experimented objects using Contact-Guage Method in the concrete of water-cement ratio 30% with the change of temperature(10, 20, 30℃) and relative humidity(30, 60, 90%). In consequence, on the first, the higher humidity, the lower autogenus shrinkage and drying shrinkage. second, it has the lowest length change of autogenus shrinkage and drying shrinkage in case of 10 ℃, and it is no difference between 20℃ and 30℃ for the constant humidity of 60% test. On the third, the ratio of drying shrinkage to autogenus shrinkage is the highest in case of the 30℃ temperature and 90% of relative humidity.

첨가물에 따른 고온 초전도 후막의 특성

소대화,전용우,이영매,김태완,Korobova, Natalya 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

In this study, by using the electrophoresis, preparation of YBCO superconducting wire deposited on metal Ag base wire was studied with its properties. YBCO powder could be prepared by solid state reactions with calcining and sintering processes. Superconducting wire prepared on metal Ag wire used as cathode of deposition base could be also fabricated in the YBCO/acetone-dispersed solution to obtain several tens of ㎛ thick films. In the process of film deposition, a catalyst I₂added into the suspension solution was very useful for preparing thick film of YBCO, and BaF₂ of additive material was also necessary for preparing crack-free wire of YBCO superconductor. As a result, YBCO superconducting wire added 2~3wt.% of BaF₂with catalyst, I₂had better deposition condition for uniform and dense YBCO wires, and critical current density, Jc was calculated at the value of 1,458A/㎠ (more than 10³A/㎠, 77K, 0[T]) of 30㎛ thick sample by 4-point prove method.

현탁용매에 따른 전기영동 초전도 후막의 영향

소대화,박정철,이영매,조용준,Korobova, Natalya 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

For the research of the effects on suspension solution with YBcO and BSCCO for elcectrophoretic deposition to prepare superconducting thick film wire, the preheating technique for the superconducting powders in vaccum system was used with various solvent solutions for electrophoresis such as acetone, toluen and buthanol was investigated. As a result, it was useful to remove the influence of remaining and adsorbed solvent solution which was existed between and on the particle surfaces when the specimens of superconducting wire by electrophoresis were treated in vacuum of 10-3 Torr and temperature around 200℃ in bell-jar system. Of the prepared superconducting wire samples, the critical current density, Jc was measured by 4-point prove method in liquid N₂, and at the value of 10³to 10⁴A/㎠, respectively, for the YBCO and BSCCO superconducting wires.

전기영동 초전도후막의 전착밀도 개선

소대화,전용우,이영매,임병제,Korobova, Natalya 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

YBCO superconducting thick films were perpared on Ag wire by electrophoresis in acetone and ethanol with chemically modified suspension. The addition of organic compounds, such a PEG into suspension solution for improving critical current density was investigated. Surfac state, deposition conditions, pore distribution and cracks were investigated by using SEM photographs. Controlling preparation conditions were studied for reducing these defects. As a results, in acetone slolution, the surface crack of samples was decreased with increasing PEG. To develop optimum microstructures for samples processes affect the microstructure and hence the properties of ceramic superconductors.

60년대 초반 중국 조선족 장편소설에 나타난 민족의식의 내면화

이해영(Li Hai-ying) 국어국문학회 2011 국어국문학 Vol.- No.157

This paper focuses on the internalization of the national spirit in Tiger Cliff written by Li Genquan who was the representative Chinese Ethnic Korean writer of the first generation appeared in the 1950s. Compared with Jin Xuetie who appeared at the same time but was evaluated as the master of the Chinese Ethnic Koreans' literature, although Li Genquan was active in the creation and left a lot of works, he couldn't draw the attention of the Ethnic Korean academics. The main reason was that as an influential local leader of the Communist Party of China, Li Genquan not only faithfully enforced the various politics and culture policy but also strove for incorporating the literary works with the mainstream of Chinese society, which were reflected from his works. The criticism and the indifference from the Ethnic Korean academics were the results of his consciousness of "Party Centralism" which was out of tune with the national consciousness. However, this paper indicates that standing on the Chinese political reality and Yanbian's situation in the early 1960s, considering about Li Genquan's political experience and his novels which drew materials from the Ethnic Koreans' history, the one-sidedness of the above evaluation can be found. The major theme of the novel Tiger Cluff written by Li Genquan in the early 1960's was that under the leadership of the Communist Party of China, Ethnic Koreans highly united to defeat the reactionary of Nationalist Party and finally got the thorough liberation, which definitely adhered to the "Party Centralism" and "Directivity of China", but the works at the same internalized Ethnic Koreans' history of their struggles even the history of Ethnic Koreans in China. In the early 60s, national problems were prohibited in political reality of Yanbian area. So Li Genquan's courage could only be explained by his national consciousness and his subject consciousness. Spreading out the national history under the leadership of Party and establishing the position in the big frame of country were probably called "internalization" of national consciousness. This kind internalization of national consciousness was the way of living which chose the Chinese Ethnic Koreans including Li Genquan, meanwhile chosen by them after National Independence. This paper discusses the way of "internalization" of national consciousness and national consciousness with this kind of "internalization" embodied in the Li Genquan's novel Tiger Cliff. Li Genquan's novel Tiger Cliff published in the early 60s did not simply express the policy of Party and the education of national history but finally pointed to the establishment of Ethnic Koreans' national rights.

Phthalocyanines as medicinal photosensitizers: Developments in the last five years

Li, Xingshu,Zheng, Bing-De,Peng, Xiao-Hui,Li, Song-Zi,Ying, Jia-Wen,Zhao, Yuanyuan,Huang, Jian-Dong,Yoon, Juyoung Elsevier 2019 Coordination Chemistry Reviews Vol.379 No.-

<P><B>Abstract</B></P> <P>Owing to their high extinction coefficients, long absorption wavelengths, and modification tunable photophysical and photochemical properties, phthalocyanines (Pcs) have been widely used as photosensitizers for photodynamic therapy (PDT). Advances made in the past five years on the development of Pcs as medicinal photosensitizers are reviewed and the main design considerations for medicinal applications of these substances are discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Recent progresses made in the development of phthalocyanines for photodynamic therapy are outlined. </LI> <LI> Representative water-soluble phthalocyanines are presented. </LI> <LI> Main targeting strategies are discussed. </LI> <LI> Future challenges are also presented. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Quantitative assessment of human health risks induced by vehicle exhaust polycyclic aromatic hydrocarbons at Zhengzhou via multimedia fugacity models with cancer risk assessment

Li, Qian,Kim, Minjeong,Liu, Ying,Yoo, ChangKyoo Elsevier 2018 Science of the Total Environment Vol.618 No.-

<P><B>Abstract</B></P> <P>Traffic-related pollution released a large amount of atmospheric polycyclic aromatic hydrocarbons (PAHs) which have severely influenced environmental safety and human health until now. However, the important issue of polycyclic aromatic hydrocarbon (PAH) emission from vehicle exhaust in urban populated areas has not been sufficiently investigated yet. This study focused on environmental behavior of vehicle exhaust PAHs (VEPAHs) and resultant health risk on local residents in urban populated areas. This study combined the multimedia fugacity models (Level III and Level IV) and the incremental lifetime cancer risk (ILCR) model, for analyzing the VEPAHs' environmental fate and related health risk on local residents in Zhengzhou of the central China. Regression models were applied to explore correlation between atmospheric concentration of VEPAHs and local pulmonary disease mortality rate. Our results demonstrate that the majority of VEPAH was sunk into the soil compartment in 2013, but the calculated BaP-equivalent concentrations of total VEPAHs in the air compartment exceeded the annual average standard limit of China (1ng/m<SUP>3</SUP>) yet. The human exposure routes of VEPAHs caused cancer risk in the following order: inhalation>dermal contact>ingestion.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PAH emissions from vehicle exhaust are evaluated using multimedia models. </LI> <LI> The ILCR model was used to evaluate the cancer risk for residents of Zhengzhou, China. </LI> <LI> Dynamic fugacity model and ILCR models elucidated the health problems of residents. </LI> <LI> Health effects are estimated for increased concentrations of VEPAHs. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>