Samsung Sdi Co., Inc.

Chang-Su Shin

Ui-Song Do

Jae-Myung Kim

So-Ra Lee

Beom-Kwon Kim

Sang-Eun Park

Su-Kyung Lee

Yu-Jeong Cho

Kyu-Nam Joo

Deok-Hyun Kim

Young-Su Kim

Jong-Hee Lee

Tae-Sik Kim

Gu-Hyun Chung

Yong-Mi Yu

Ha-Na Yoo

Sung-Su Kim

Young-Ugk Kim

Hyun-Ki Park

So-La Lee

Sean Do

A negative active material, a method of preparing the same, and a lithium battery including the negative active material are disclosed. The negative active material includes a silicon-based nanocore and a first amorphous carbonaceous coating layer that is formed of carbonized organic material and that is uniformly and continuously formed on a surface of the silicon-based nanocore, whereby irreversible capacity losses due to volumetric expansion/contraction caused when a lithium battery is charged and discharged are compensated and cycle lifetime characteristics are enhanced.

Negative active material, method of preparing the same, and lithium battery including negative active material

Provided is a lithium battery including: a positive electrode, a negative electrode, and an organic electrolytic solution, wherein the negative electrode has a metal/metalloid nanostructure, and the organic electrolytic solution includes a lithium sulfonimide-based compound.

Lithium battery

In an aspect, a negative active material, a negative electrode and a lithium battery including the negative active material, and a method of manufacturing the negative active material is provided. The negative active material includes a silicon-based active material substrate; a metal oxide nanoparticle disposed on a surface of the silicon-based active material substrate. An initial irreversible capacity of the lithium battery may be decreased and lifespan characteristics may be improved by using the negative active material.

Negative active material and negative electrode and lithium battery containing the material, and method of manufacturing the same

A negative active material includes a conductive unit bound in island-like form to silicon-based nanowires on a carbonaceous base. Such negative active material may improve the electrical conductivity of the silicon-based nanowires, and suppress separation of the silicon-based nanowires caused from volume expansion, and thus may improve lifetime characteristics of a lithium battery.

Negative active material, negative electrode, and lithium battery

A negative active material and a lithium battery including the negative active material. The negative active material includes a non-carbonaceous nanoparticle capable of doping or undoping lithium; and a crystalline carbonaceous nano-sheet, wherein at least one of the non-carbonaceous nanoparticle and the crystalline carbonaceous nano-sheet includes a first amorphous carbonaceous coating layer on its surface, and thus an electrical conductivity thereof is improved. In addition, a lithium battery including the negative active material has an improved efficiency and lifetime.

Negative active material and lithium battery including negative active material

In one aspect, an anode active material is provided. The anode active material may include a crystalline carbon-based material that includes a core having a lattice spacing dof about 0.35 nm or more, and titanium-based oxide particles.

Anode active material, anode and lithium battery including the material, and method of preparing the material

Provided are a negative active material, a method of preparing the same, and a lithium battery including the negative active material, wherein the negative active material includes a carbonaceous material that has a peak with respect to a surface (002) at a Bragg angle 2&#x3b8; of 26.4&#xb0;&#xb1;0.1&#xb0; in an X-ray diffraction spectrum, has a full width at half maximum of the peak with respect to the surface (002) of about 0.2&#xb0; to about 0.6&#xb0;, has an interlayer spacing (d) of the surface (002) measured by X-ray diffraction of about 3.36 &#x212b; to about 3.37 &#x212b;, and has a crystallite size measured from the full width at half maximum of the peak with respect to the surface (002) of about 10 nm to about 45 nm, wherein the carbonaceous material includes a core; and an amorphous carbon layer disposed on a non-cracked surface portion of the core.

Negative active material, method of preparing the same, and lithium battery including the same

A secondary particle and a lithium battery including the same are provided wherein the secondary particle includes a plurality of primary particles and each primary particle contains n polycyclic nano-sheets disposed upon one another. The polycyclic nano-sheets include hexagonal rings of six carbon atoms linked to each other, wherein a first carbon and a second carbon have a distance therebetween of L. Lis a distance between a third carbon and a fourth carbon, and the arrangement of the polycyclic nano-sheets is such that L&#x2267;L. The secondary particle is used as a negative active material in the lithium battery, and the secondary particle contains pores, thereby allowing for effective intercalating and deintercalating of the lithium ions into the secondary particle to impart improved capacity and cycle lifespan.

Secondary particle and lithium battery including secondary particle

In an aspect, a negative active material, a method of preparing the negative active material, and a lithium battery including the negative active material are provided. The method of preparing the negative active material may increase pulverizing efficiency in pulverizing a silicon-based bulky particle into a nano-size silicon-based primary particle and decrease a capacity loss of the obtained negative active material. The nano-size negative active material has excellent crystalline characteristics, high capacity, and high initial efficiency, due to a decrease in surface oxidation and surface damage.

Negative active material, method of manufacturing the same, and lithium battery including the negative active material

A composite anode active material, an anode and a lithium battery each including the composite anode active material, and a method of preparing the composite anode active material. The composite anode active material includes a composite core, and a coating layer covering at least a region of the composite core, wherein the composite core includes a carbonaceous substrate and a metal/semi-metal nanostructure on the carbonaceous substrate, the coating layer is more predominant on the nanostructure than on the carbonaceous substrate, and the coating layer includes a metal oxide.

Composite anode active material, anode and lithium battery comprising the material, and method of preparing the same

In an aspect, a composite anode active material including: a porous particles, said porous particles including: a plurality of composite nanostructures; and a first carbonaceous material binding the composite nanostructures, wherein the porous particles have pores within the particle, and wherein the composite nanostructures include a crystalline second carbonaceous material substrate including at least one carbon nano-sheet, and a plurality of metal nanowires arranged at intervals on the crystalline second carbonaceous material substrate is disclosed.

Composite anode active material, anode and lithium battery containing the same, and method of preparing the composite anode active material

In an aspect, a composite anode active material including particles, wherein the particles include: a first carbonaceous material that is substantially crystalline and includes at least one carbon nano-sheet; a non-carbonaceous material capable of intercalating and deintercalating lithium; and a second carbonaceous material that binds the first carbonaceous material and the non-carbonaceous material, wherein the particles have pores having a size of 50 nm or more is disclosed.

Composite anode active material, anode and lithium battery including the same, and method of preparing composite anode active material

A negative active material and a lithium battery are provided. The negative active material includes a composite core, and a coating layer formed on at least part of the composite core. The composite core includes a carbonaceous base and a metal/metalloid nanostructure disposed on the carbonaceous base. The coating layer includes a metal oxide coating layer and an amorphous carbonaceous coating layer.

Negative active material, and negative electrode and lithium battery each including the negative active material

Provided are a negative active material, a method of preparing the same, and a lithium battery including the negative active material. The negative active material includes a carbonaceous core that has a sulfur content of about 10 ppm to 900 ppm; and an amorphous carbon layer continuously formed on a surface of the carbonaceous core, wherein the carbonaceous core has a crystalloid plate structure, and a crystallite size measured from a full width at half maximum of the peak with respect to the surface (002) of about 10 nm to about 45 nm in an X-ray diffraction spectrum of the carbonaceous core. The lithium battery including a negative electrode including the negative active material has improved capacity characteristics and ring lifetime characteristics.

A negative active material containing super-conductive nanoparticles coated with a high capacity negative material and a lithium battery including the same are provided, wherein the super-conductive nanoparticles have a structure in which polycyclic nano-sheets are stacked upon one another along a direction perpendicular to a first plane. The polycyclic nano-sheets include hexagonal rings of six carbons atoms linked to each other, wherein a first carbon and a second carbon have a distance therebetween of L. Lis a distance between a third carbon and a fourth carbon, and the arrangement of the polycyclic nano-sheets is such that L&#x2267;L. The super-conductive nanoparticle is used as a negative active material in a lithium battery, and the super-conductive nanoparticle increases the capacity, thereby improving the capacity and lifespan of the lithium battery.

Growing community of inventors

Yongin-si, South Korea

Chang-Su Shin