• 한국전기화학회:학술대회논문집
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• 1999.04a
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• pp.67-67
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• 1999

• 한국전기화학회:학술대회논문집
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• 2003.04a
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• pp.60-60
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• 2003

• 한국전기화학회:학술대회논문집
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• 2003.04a
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• pp.61-61
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• 2003

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.59.2-59
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• 1998

• Proceedings of the Materials Research Society of Korea Conference
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• 1997.10a
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• pp.71-71
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• 1997

• Proceedings of the Materials Research Society of Korea Conference
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• 1997.05a
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• pp.90-90
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• 1997

• Bulletin of the Korean Chemical Society
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• v.20 no.8
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• pp.885-892
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• 1999

This communication describes the synthesis of : (i) non-toxic and low cost nanocrystalline electrode materials, which can be prepared advantageously at low temperature ; (ii) highly conductive electrolyte membranes formed by the nano-encapsulation within a poly(acrylonitrile)-based polymer matrix of a solution of LiPF6 in organic solvants. The performances of rechargeable PLR (Plastic Lithium Rechargeable) batteries using the above mentioned components are presented.

• Journal of Hydrogen and New Energy
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• v.22 no.4
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• pp.504-511
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• 2011

Nano-sized Sn powder was prepared by pulsed wire evaporation method. The Sn powder and carbon black were charged in jar and ball milled. The milling time was varied with 10 min., 1h, 2h, and 4h, respectively. The milled powders were dried and the shape and size were observed by FE-SEM. Nano-sized Sn powders were plastic-deformed and agglomerated by impact force of balls and heat generated during the SPEX milling. The agglomerated Sn powder also consisted of many nano-sized particles. Initial discharge capacities of milled Sn electrode powders with carbon powder were milled for 10 min., 1h, 2h, and 4h were 787, 829, 827, and 816 mAh/g, respectively. After 5 cycle, discharge capacities of Sn electrode powders with carbon powder milled for 10 min., 1h, 2h, and 4h decreased as 271, 331, 351, and 287 mAh/g, respectively. Because Sn electrode powders milled for 2h constist of uniform and fine size, the cyclability of coin cell made of this powders is better than others.

• Proceedings of the KIEE Conference
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• 1999.11d
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• pp.965-967
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• 1999

In order to solve to instability in air and to format dentrite, we used carbonized phenol resin electrode which is amorphous carbon. The structure and properties of deeply Li-doped carbonized phenol resin have been investigated in association with their utilization as electrodes in rechargeable batteries. Resol type phenol resin used as starting material. The doped lithium was found neither in metallic nor in ionic states even in the most deeply doped state($C_{2.2}$Li stage). It has also been confirmed that the carbonized phenol resin electrode has a large capacity with good stability and reversibility. These results strongly suggest that the carbonized phenol resin can make an excellent anode material for secondary batteries. Finally, we discuss that the carbonized phenol resin doped up to the $C_2Li$ stage can exhibit an energy density per volume as high as lithium metal. We know that carbonized phenol resin can used as cathode as well as anode by cyclic voltammogram.

• Journal of Electrochemical Science and Technology
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• v.8 no.1
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• pp.15-24
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• 2017

A comparative study was performed on the passivating abilities of surface films generated on lithium titanate (LTO; $Li_4Ti_5O_{12}$) electrodes during pre-cycling at two different rates. The surface film deposited at a faster pre-cycling rate (i.e., 0.5 C) is irregularly shaped and unevenly covers the LTO electrode. Owing to the incomplete coverage of the protective film, this LTO electrode exhibits poor passivating ability. Additional electrolyte decomposition and concomitant film deposition occur during subsequent charge/discharge cycles. As a result of the thick surface film, severe cell polarization occurs and eventually causes cell failure. However, pre-cycling the Li/LTO cell at a slower rate (0.1 C) improves cell polarization and capacity retention; this occurs because the surface film uniformly covers the LTO electrode and provides strong passivation. Accordingly, there is no significant film deposition during subsequent charge/discharge cycling. Additionally, self-discharge is reduced during high-temperature storage.