Lg Chem, Ltd

Chee Sung Park

Jae Hyun Kim

Shin Hee Jun

Cheol Hee Park

Han Nah Jeong

Kyung Moon Ko

Min Kyoung Kim

Myung Jin Jung

Yu Ho Min

Dong Hwan Kim

Sang Yun Jung

Su Hee Lee

Kwang Seoung Jeon

Won Bae Byun

Minsung Park

Harim Jeon

Minkyoung Kim

Myungjin Jung

The present disclosure relates to a polymer complex containing microcellulose fibers comprising nanofibrils and fine particles; and a polymer matrix comprising a polyester resin. According to the present disclosure, there is provided a polymer complex capable of exhibiting excellent mechanical properties while being environmentally friendly by including cellulose fibers as a reinforcing material.

Polymer complex

A compound semiconductor which has an improved thermoelectric performance index together with excellent electrical conductivity, and thus may be utilized for various purposes such as a thermoelectric conversion material of thermoelectric conversion devices, solar cells, and the like, and to a method for preparing the same.

Compound semiconductor and use thereof

A chalcogen-containing compound of the following Chemical Formula 1 which exhibits excellent phase stability at a low temperature, particularly at a temperature corresponding to the driving temperature of a thermoelectric element, and also exhibits an excellent thermoelectric performance index through an increase in a power factor and a decrease in thermal conductivity, a method for preparing the same, and a thermoelectric element including the same:VMSnBiSeTe&#x2003;&#x2003;[Chemical Formula 1]In the above Formula 1, V is a vacancy, M is an alkali metal, x is greater than 0 and less than 1, and y is greater than 0 and less than or equal to 1.

Chalcogen-containing compound, its preparation method and thermoelectric element comprising the same

A chalcogen-containing compound of the following Chemical Formula 1 which exhibits excellent phase stability at a temperature corresponding to the driving temperature of a thermoelectric element, and also exhibits an excellent thermoelectric performance index (ZT) through an increase in a power factor and a decrease in thermal conductivity, a method for preparing the same, and a thermoelectric element including the same:VMSnPbBiSeTe&#x2003;&#x2003;[Chemical Formula 1]In the above Formula 1, V is a vacancy, M is an alkali metal, x is greater than 0 and less than 1, y is greater than 0 and less than 4, and z is greater than 0 and less than or equal to 1.

The present invention relates to a novel chalcogen-containing compound that exhibits excellent phase stability even at a temperature corresponding to the driving temperature of a thermoelectric element, and has a high output factor and thermoelectric figure of merit, a method for preparing the same, and a thermoelectric element including the same.

A chalcogen-containing compound of the following Chemical Formula 1, which may have decreased thermal conductivity and improved power factor in the low temperature region, and thus exhibit an excellent thermoelectric figure of merit, a method for preparing the same, and a thermoelectric element including the same:VSnInSbTe&#x2003;&#x2003;[Chemical Formula 1]wherein V, a and x are as defined in the specification.

The present invention provides a novel compound semiconductor that has improved thermoelectric figure of merit as well as excellent electric conductivity, and thus, can be applied for various uses such as thermoelectric conversion material of a thermoelectric conversion device, a solar battery, and the like, and a method for preparing the same.

A novel compound semiconductor that can be used for a solar battery, a thermoelectric material, and the like, and use thereof. The novel compound semiconductor may be represented by the following Chemical Formula: NdSCoSbQ, wherein Q is one or more selected from the O, Se, or Te, 0&#x3c;x&#x3c;0.2, 0&#x3c;y&#x2264;1, and 0&#x3c;z&#x3c;12.

A chalcogen-containing compound of the following chemical formula which exhibits an excellent thermoelectric performance index (ZT) through an increase in power factor and a decrease in thermal conductivity, a method for preparing the same, and a thermoelectric element including the same: MVSnSbTe, wherein V is vacancy, M is at least one alkali metal, x&#x2265;6, and 0&#x3c;y&#x2264;0.4.

A novel compound semiconductor which can be used for a solar cell, a thermoelectric material, or the like, and the use thereof.

A chalcogen-containing compound of the following Chemical Formula 1 which exhibits excellent phase stability even at a low temperature, particularly at a temperature corresponding to an operating temperature of a thermoelectric element, and also exhibits a significantly superior power factor and thermoelectric performance index due to its excellent electrical conductivity and low thermal conductivity caused by its unique crystal lattice structure, a method for preparing the same, and a thermoelectric element including the same. [Chemical Formula 1]&#x2014;VSnBiAgSe, wherein V is vacancy and 0&#x3c;x&#x3c;0.5.

Provided are a secondary battery including a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein the positive electrode and the negative electrode include first solid electrolyte particles, the solid electrolyte layer includes second solid electrolyte particles, and a particle diameter of the second solid electrolyte particles is greater than a particle diameter of the first solid electrolyte particles. In the secondary battery, the electrode may increase the amount of movement of lithium ions by increasing a contact area between the solid electrolyte particles and electrode active material, and the solid electrolyte layer may minimize the reduction of ionic conductivity by decreasing interfacial resistance due to the contact between the electrode and the solid electrolyte layer. Thus, stability and performance of the secondary battery may be improved.

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Daejeon, South Korea

Chee Sung Park