• Journal of Powder Materials
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• v.23 no.1
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• pp.33-37
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• 2016

10 wt.% and 20 wt.%$Li-TiO_2$ composite powders are synthesized by a sol-gel method using titanium isopropoxide and $Li_2CO_3$ as precursors. The as-received amorphous 10 wt.%$Li-TiO_2$ composite powders crystallize into the anatase-type crystal structure upon calcination at $450^{\circ}C$, which then changes to the rutile phase at $750^{\circ}C$. The asreceived 20 wt%$Li-TiO_2$ composite powders, on the other hand, crystallize into the anatase-type structure. As the calcination temperature increases, the anatase $TiO_2$ phase gets transformed to the $LiTiO_2$ phase. The peaks for the samples obtained after calcination at $900^{\circ}C$ mainly exhibit the $LiTiO_2$ and $Li_2TiO_3$ phases. For a comparison of the photocatalytic activity, 10 wt.% and 20 wt.% $Li-TiO_2$ composite powders calcined at $450^{\circ}C$, $600^{\circ}C$, and $750^{\circ}C$ are used. The 20 wt.%$Li-TiO_2$ composite powders calcined at $600^{\circ}C$ show excellent efficiency for the removal of methylorange.

• 한국전기화학회:학술대회논문집
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• 2004.04a
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• pp.20-20
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• 2004

• Korean Journal of Materials Research
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• v.20 no.2
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• pp.72-77
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• 2010

Glass-ceramics were fabricated by heat-treatment of glass obtained by melting a coal bottom ash with $Li_2O$ addition. The main crystal grown in the glass-ceramics, containing 10 wt% $Li_2O$, was $\beta$-spodumene solid solution, while in $Li_2O$ 20 wt% specimen was mullite, identified using XRD. The activation energy and Avrami constant for crystallization were calculated and showed that bulk crystallization behavior will be predominant, and this expectation agreed with the microstructural observations. The crystal phase grown in $Li_2O$ 10 wt% glass-ceramics had a dendrite-like shaped whereas the shape was flake-like in the 20 wt% case. The thermal expansion coefficient of the $Li_2O$ 10 wt% glass-ceramics was lower than that of the glass having the same composition, owing to the formation of a $\beta$-spodumene phase. For example, the thermal expansion coefficient of $Li_2O$ 10 wt% glass-ceramics was $20\times10^{-7}$, which is enough for application in various heat-resistance fields. But above 20 wt% $Li_2O$, the thermal coefficient expansion of glass-ceramics, on the contrary, was higher than that of the same composition glass, due to formation of mullite.

• Journal of the Korean Electrochemical Society
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• v.6 no.3
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• pp.178-182
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• 2003

The oxygen reduction and NiO dissolution behaviors in Li-Na-K three component carbonate melts have been investigated with various compositions through electrochemical and chemical ways. The oxygen reduction currents and NiO solubilities were measured at $650^{\circ}C$ and atmospheric condition in Li-Na-K =47.4-32.6-20, 60-20-20, 50-40-10, $40-40-20 mol\%$ carbonate melts. The oxygen reduction currents showed dependence on the composition, indicating oxygen solubility is a function of carbonate composition. At the composition of $ Li-Na-K=50-40-10 mol%$, a broader peak was observed, suggesting different oxygen reduction mechanism probably prevails in this composition. In contrast, insignificant differences of NiO solubility were obtained among the compositions.

• The Research Journal of the Costume Culture
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• v.20 no.5
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• pp.775-781
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• 2012

There are various kinds of patterns on Li brocade textile of Hainan province in China. Those patterns are rich and colorful. Li (黎族) traditional brocade is an ancient exquisite craftsmanship and a world cultural heritage. This study analyzed and categorized Li brocade pattern of traditional Chinese textiles. Li (黎族) traditional brocade is an ancient exquisite craftsmanship. Based on the research of classifications of Li brocade patterns, expound the application of women's costume. The patterns of Li brocade textile of Hainan province analyzed through three levels: design transforming, meaning prolongation, and refining spirit. The patterns were explored the feasibility way to inherit the patterns of Li brocade for the modern fashion product design. The results showed that Li brocade textile pattern of Hainan province were images sourced from local environment and geographical terrain. They contained the nation's history memory, religion, hope for life of the Li nationality. Those patterns can be categorized as human figure pattern, animal pattern, geometric pattern, appliance or architecture pattern, and Chinese character pattern.

• Journal of the Korean Solar Energy Society
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• v.26 no.4
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• pp.73-81
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• 2006

In this paper, with water-LiBr-LiSCN mixture which utilizes solar energy as mid temperature range evaporator heat source, a thermodynamic analysis was performed to provide design data for a double-effect absorption heating system. A comparative study of the water-LiBr-LiSCN mixture against the water-LiBr pair was conducted by a computer simulation. The computer simulation is based on mass, material and heat balance equations for each part of the system. Coefficients of performance and flow ratios for effects of different operating temperatures are investigated. It is found that the heating COP is higher for the water-LiBr-LiSCN mixture than for the water-LiBr pair, and FR is lower for the former.

• Bulletin of the Korean Chemical Society
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• v.32 no.10
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• pp.3682-3686
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• 2011

The electrochemical properties of lithium-sulfur batteries with binary electrolytes based on DME and DOL, TEGDME and DOL mixed solvent containing $LiClO_4$, LiTFSI, and LiTF salts were investigated. The ionic conductivity of 1M LiTFSI and $LiClO_4$ electrolytes based on TEGDME and DOL increased as the volume ratio of DOL solvent increased, because DOL effectively reduces the viscosity of the above electrolytes medium under the same salts concentration. The first discharge capacity of lithium-sulfur batteries in the DME and DOL-based electrolyte followed this order: LiTFSI (1,000 mAh/g) > LiTF (850 mAh/g) > $LiClO_4$ (750 mAh/g). In case of the electrolyte based on TEGDME and DOL, the first discharge capacity of batteries followed this order: $LiClO_4$ (1,030 mAh/g) > LiTF (770 mAh/g) > LiTFSI (750 mAh/g). The cyclic efficiency of lithium-sulfur batteries at 1M $LiClO_4$ electrolytes is higher than that of batteries at other lithium salts-based electrolytes. Lithium-sulfur battery showed discharge capacity of 550 mAh/g until 20 cycles at all electrolytes based on DME and DOL solvent. By contrast, the discharge capacity of batteries was about 450 mAh/g at 1M LiTFSI and LiTF electrolytes based on TEGDME and DOL solvent after 20 cycles.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.07a
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• pp.595-596
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• 2005

This research which it sees adds $LiMn_2O_4$ in the activated carbon electrode the test against the effect which it follows is. Test cells, which were $LiMn_2O_4$fabricated with active mass composite consisted of (100-X)% of MSP-20 and (X)% of $LiMn_2O_4$ (X=20,40,60,80,100), exhibits the better specific capacitance than those of the cells fabricated with single active mass that is MSP-20. The enhanced properties of composite active mass could be caused by capability of $LiMn_2O_4$ powders. But the resistance was increase by proportionate in $LiMn_2O_4$ addition and when mixture ratio of the activated carbon and the $LiMn_2O_4$ being similar, to be low rather to the after where had become the maximum it came.

• Korean Journal of Acupuncture
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• v.19 no.1
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• pp.15-23
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• 2002

This study was carried to identify the component of Large Intestine Meridian Muscle in human, dividing into outer, middle, and inner part. Brachium and antebrachium were opened widely to demonstrate muscles, nerve, blood vessels and the others, displaying the inner structure of Large Intestine Meridian Muscle. We obtained the results as follows; 1. Meridian Muscle is composed of the muscle, nerve and blood vessels. 2. In human anatomy, it is present the difference between a term of nerve or blood vessels which control the muscle of Meridian Muscle and those which pass near by Meridian Muscle. 3. The inner composition of meridian muscle in human arm is as follows. 1) Muscle; extensor digitorum tendon(LI-1), lumbrical tendon(LI-2), 1st dosal interosseous muscle(LI-3), 1st dosal interosseous muscle and adductor pollicis muscle(LI-4), extensor pollicis longus tendon and extensor pollicis brevis tendon(LI-5), adductor pollicis longus muscle and extensor carpi radialis brevis tendon(LI-6), extensor digitorum muscle and extensor carpi radialis brevis mucsle and abductor pollicis longus muscle(LI-7), extensor carpi radialis brevis muscle and pronator teres muscle(LI-8), extensor carpi radialis brevis muscle and supinator muscle(LI-9), extensor carpi radialis longus muscle and extensor carpi radialis brevis muscle and supinator muscle(LI-10), brachioradialis muscle(LI-11), triceps brachii muscle and brachioradialis muscle(LI-12), brachioradialis muscle and brachialis muscle(LI-13), deltoid muscle(LI-14, LI-15), trapezius muscle and supraspinous muscle(LI-16), platysma muscle and sternocleidomastoid muscle and scalenous muscle(LI-17, LI-18), orbicularis oris superior muscle(LI-19, LI-20) 2) Nerve; superficial branch of radial nerve and branch of median nerve(LI-1, LI-2, LI-3), superficial branch of radial nerve and branch of median nerve and branch of ulna nerve(LI-4), superficial branch of radial nerve(LI-5), branch of radial nerve(LI-6), posterior antebrachial cutaneous nerve and branch of radial nerve(LI-7), posterior antebrachial cutaneous nerve(LI-8), posterior antebrachial cutaneous nerve and radial nerve(LI-9, LI-12), lateral antebrachial cutaneous nerve and deep branch of radial nerve(LI-10), radial nerve(LI-11), lateral antebrachial cutaneous nerve and branch of radial nerve(LI-13), superior lateral cutaneous nerve and axillary nerve(LI-14), 1st thoracic nerve and suprascapular nerve and axillary nerve(LI-15), dosal rami of C4 and 1st thoracic nerve and suprascapular nerve(LI-16), transverse cervical nerve and supraclavicular nerve and phrenic nerve(LI-17), transverse cervical nerve and 2nd, 3rd cervical nerve and accessory nerve(LI-18), infraorbital nerve(LI-19), facial nerve and infraorbital nerve(LI-20). 3) Blood vessels; proper palmar digital artery(LI-1, LI-2), dorsal metacarpal artery and common palmar digital artery(LI-3), dorsal metacarpal artery and common palmar digital artery and branch of deep palmar aterial arch(LI-4), radial artery(LI-5), branch of posterior interosseous artery(LI-6, LI-7), radial recurrent artery(LI-11), cephalic vein and radial collateral artery(LI-13), cephalic vein and posterior circumflex humeral artery(LI-14), thoracoacromial artery and suprascapular artery and posterior circumflex humeral artery and anterior circumflex humeral artery(LI-15), transverse cervical artery and suprascapular artery(LI-16), transverse cervical artery(LI-17), SCM branch of external carotid artery(LI-18), facial artery(LI-19, LI-20)

• Resources Recycling
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• v.10 no.6
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• pp.9-14
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• 2001

A sulfuric acid leaching of $LiCoO_2$as cathodic active materials of lithium ion secondary batteries was investigated in terms of reaction variables. In the absence of a reducing agent, the extraction of cobalt was less than 40% in 2 M sulfuric acid at $75^{\circ}C$ instead of that of lithium could be almost 100% in the same conditions. To improve the Co extraction, hydrogen peroxide was used as a reducing agent in the range 2~20 vol%. When over 10vo1% hydrogen peroxide was added, the extractions of both metals were improved to about 95%. It seems to be due to the reduction of Co(III) to Co(II) that can be readily dissolved. The extractions of Co and Li were increased with increasing $H_2$$SO_4$concentration and temperature, and amount of hydrogen peroxide and with decreasing of pulp density. The optimum leaching conditions were determined at $2 M H_2$$SO_4$concentration, $75^{\circ}C$ operating temperature, 100 g/L. initial pulp density, 20 vol% $H_2$$O_2$addition and 30 min.