About 53 results
https://drivepatents.com/patents/991295 · 1 May 2013
Provided is a raw material carbon composition for a negative electrode material for a lithium-ion secondary battery useful for achieving excellent high-speed charge and discharge characteristics. The raw material carbon composition is obtained by subjectin...
https://drivepatents.com/patents/991440 · 24 Apr 2013
The present invention relates to a negative electrode active material for an electrode composition, and to an electrochemical cell comprising the negative electrode active material, wherein the negative electrode active material comprises an amorphous carb...
https://drivepatents.com/patents/993670 · 23 Jan 2013
There is provided a lithium ion secondary battery excellent in cycle characteristics in which the conductivity of an electrode using a graphite material which is less deformed and oriented by pressurization is improved. A negative electrode mixture which i...
https://drivepatents.com/patents/996102 · 14 Nov 2012
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 am...
https://drivepatents.com/patents/997685 · 3 Oct 2012
Disclosed is a carbon material for lithium ion secondary cell having a positron lifetime of 370 picoseconds or longer, and 480 picoseconds or shorter, when measured by positron annihilation spectroscopy under conditions (A) to (E) below: (A) positron radia...
https://drivepatents.com/patents/1005439 · 8 Feb 2012
The present invention provides a mixed carbon material which comprises carbon material A and carbon material B and which is a carbon material suitable for a negative electrode material which can provide a nonaqueous secondary battery having a low irreversi...
https://drivepatents.com/patents/1006769 · 28 Dec 2011
To provide a negative electrode material capable of giving a lithium ion secondary battery that is sufficiently small in the charge/discharge irreversible capacity observed at the initial cycle stage, has excellent high-temperature storage characteristics,...
https://drivepatents.com/patents/1007740 · 23 Nov 2011
A process for producing a carbon material comprising (A) a step of polymerizing a compound represented by the formula (1) wherein R is independently in each occurrence a hydrogen atom etc., R' is independently in each occurrence a hydrogen atom etc., and n...
https://drivepatents.com/patents/1008159 · 2 Nov 2011
An object of the present invention is to provide a method of producing carbon particles for an electrode, the carbon particles being highly suitable for use as an electrode material, and being able to achieve a high charge/discharge efficiency and durabili...
https://drivepatents.com/patents/1008329 · 26 Oct 2011
The invention provides a stock oil composition for a carbon material for a negative electrode for a lithium ion secondary battery, having a 10 vol% distillation temperature of 280°C or higher as the distillation property, a density of at least 0.90 g/cmat...