http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Choi, Mansoo,Lee, Sang-Hun,Jung, Yang-Il,Jung, Jun-Young,Park, Jung-Soon,Choi, Wang-Kyu,Park, Sang-Yoon,Won, Hui-Jun,Moon, Jei-Kwon,Choi, Jihoon,Kim, Seon-Byeong ELSEVIER SCIENCE 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.729 No.-
<P><B>Abstract</B></P> <P>NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film has been prepared by electron beam evaporation method and has been investigated as anode materials providing large reversible Li<SUP>+</SUP> capacity with high cycling performance for lithium ion batteries. The NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film crystallized with annealing process after NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film deposition. In electrochemical measurements, the first discharge and charge capacity of NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film were found to be 1693 mAh g<SUP>−1</SUP> and 1108 mAh g<SUP>−1</SUP>, which is above its theoretical capacity (915 mAh g<SUP>−1</SUP>). In addition, the cycle performance test of NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film also showed steady charge-discharge capacity at 0.1 C during 100 cycles compared to other NiFe<SUB>2</SUB>O<SUB>4</SUB> materials, indicating that the empty space or porous surface of electrode was beneficial for accessibility of electrolyte and served as buffer to alleviate stress.</P> <P><B>Highlights</B></P> <P> <UL> <LI> NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film has been prepared by electron beam evaporation method. </LI> <LI> The first discharge and charge capacity of NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film were found to be 1693 mAh g<SUP>−1</SUP> and 1108 mAh g<SUP>−1</SUP>. </LI> <LI> The cycle performance test of NiFe<SUB>2</SUB>O<SUB>4</SUB> thin film also showed steady charge-discharge capacity at 0.1 C during 100 cycles. </LI> </UL> </P>
Choi, Mansoo,Kim, Hyun-Soo,Lee, Young Moo,Jin, Bong-Soo The Korean Electrochemical Society 2014 Journal of electrochemical science and technology Vol.5 No.4
The $Li_3V_2(PO_4)_3$/graphene nano-particles composite was successfully synthesized by a facile sol-gel method. The addition of a graphene in $Li_3V_2(PO_4)_3(LVP)$(LVP) showed the high crystallinity and influenced the morphology of the $Li_3V_2(PO_4)_3$ particles observed in X-ray diffraction (XRD) and scanning electron microscopy (SEM). The LVP/graphene samples were well connected, resulting in fast charge transfer. The effect of the addition graphene nano-particles on electrochemical performance of the materials was investigated. Compared with the pristine LVP, the LVP/graphene composite delivered a higher discharge capacity of $122mAh\;g^{-1}$ at 0.1 C-rate, better rate capability and cyclability in the potential range of 3.0-4.3 V. The electrochemical impedance spectra (EIS) measurement showed the improved electronic conductivity for the LVP/graphene composite, which can ensure the high specific capacity and rate capability.
Mansoo Choi,Seung-Eun Kim,In-Ho Yoon,Chong-Hun Jung,Wang-Kyu Choi,Jei-Kwon Moon,Seon-Byeong Kim 한국방사성폐기물학회 2018 방사성폐기물학회지 Vol.16 No.2
As part of planning for waste minimization, decontamination foam has been considered as a potential application for the cleaning of radioactive contaminant. In this study, we synthesized silica particles to improve foam stability by varying synthesis parameters. Cetyltrimethylammonium bromide (CTAB) was found to influence the stability of the decontamination foam. The reason was that higher interaction between SiO2 nanoparticles and surfactant at the air-water interface in aqueous solution is beneficial for foam stability. CTAB can also be used as an additive for the aggregation of silica nanoparticles. In the separation of SiO2 nanoparticles, CTAB plays a critical role in the nanoparticles flocculation because of the charge neutralization and hydrophobic effects of its hydrocarbon tails.