The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2018
Filed:
Oct. 15, 2014
Ulvac, Inc., Kanagawa, JP;
Naoki Tsukahara, Kanagawa, JP;
Yoshiaki Fukuda, Kanagawa, JP;
Tatsuhiro Nozue, Kanagawa, JP;
Hirohiko Murakami, Kanagawa, JP;
ULVAC, INC., Kanagawa, JP;
Abstract
Provided are a positive electrode for a lithium-sulfur secondary battery capable of surely covering with sulfur a portion of carbon nanotubes near a current collector and capable of supplying an electrolytic solution up to the vicinity of a base end of the carbon nanotubes efficiently even when sulfur expands in volume during discharge, and a method of forming the same. The positive electrode for a lithium-sulfur secondary battery includes: a current collector; a plurality of carbon nanotubes which are grown on a surface of the current collector such that the current collector-surface side serves as a base end and so as to be oriented in a direction perpendicular to the surface of the current collector; and sulfur to cover the surface of each of the carbon nanotubes at a density of the carbon nanotubes of 40 mg/cmor less.