Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Kenichi Morigaki

Norishige Nanai

Shigeo Kobayashi

Kazunori Haraguchi

Hiroshi Fukuda

Tomokazu Mitamura

Noriko Kabuto

Kazuhiro Watanabe

Harunari Shimamura

Masaya Ugaji

Kazuya Iwamoto

Hizuru Koshina

Fumio Kato

Yoshiaki Nitta

Shinji Mino

Jun Nunome

Yasuyuki Shibano

Toshihiko Ikehata

Masaya Okochi

Shuichi Nishino

Susumu Yamanaka

Shinji Fujii

Shinichiro Tahara

Tohru Hitomi

Syuichi Nishino

A lithium battery () including a positive electrode () containing low-crystallinity manganese dioxide having a specific surface area of 8 to 28 m/g as a positive electrode active material, a negative electrode () containing metallic lithium or a lithium alloy as a negative electrode active material, and an organic electrolyte is provided. The lithium battery (), due to said low-crystallinity manganese dioxide contained therein, has excellent storage characteristics at high temperatures of 100&#xb0; C. or higher, large-current discharge characteristics, large-current pulse discharge characteristics, low-temperature discharge characteristics, and like characteristics, and in addition, is cost advantageous.

Lithium battery

A lithium primary batteryincludes an electrode group in which a positive electrodehaving iron disulfide as a positive electrode active material and a negative electrodehaving lithium as a negative electrode active material are wound, with a separatorinterposed between the positive electrodeand the negative electrode, wherein a density of the iron disulfide in a positive electrode mixture containing the positive electrode active material is in a range of 2.2-2.9 g/cm, and the separatoris made of a non-woven fabric whose tensile strength is in a range of 6-30 N/mm.

Lithium primary battery

A lithium primary battery including a positive electrode, a negative electrode, an organic electrolyte, and a separator interposed between the positive electrode and the negative electrode: the negative electrode including a negative electrode active material; the negative electrode active material being at least one selected from the group consisting of lithium metal and a lithium alloy; at least a surface layer portion of the negative electrode including a composite of amorphous carbon material and the negative electrode active material; and the surface layer portion facing the positive electrode with the separator interposed therebetween.

Lithium primary battery and manufacturing method therefor

A negative electrode of a non-aqueous electrolyte secondary battery contains, as main a component, composite particles constructed in such a manner that at least part of the surface of nuclear particles comprising at least one of tin, silicon and zinc as a constituent element, is coated with a solid solution or an inter-metallic compound composed of elements included in the nuclear particle and at least one element, exclusive of the element included in said nuclear particle, selected from a group of elements in a Periodic Table, comprising group 2 elements, transition elements, group 12 elements, group 13 elements and group 14 elements exclusive of carbon. The batteries of the present invention include non-aqueous electrolytic solution and solid electrolytes comprising polymer gel electrolytes. The construction of the present invention provides a non-aqueous electrolytic secondary battery with which a possibility of the generation of gas is extremely low when stored at high temperatures. It also provides a battery having higher capacity, and superior cycle properties, high-rate charge/discharge properties.

Non-Aqueous electrolyte secondary battery comprising composite particles

In order to improve a storage stability at high temperatures of a lithium polymer battery including: a positive electrode comprising a lithium-containing complex oxide; a negative electrode comprising a material capable of absorbing and desorbing a lithium ion; and a separator comprising a liquid organic electrolyte and a host polymer retaining the liquid organic electrolyte, the separator is rendered homogeneous and excellent in the affinity with the organic electrolyte by using a crosslinked copolymer having a main-chain comprising a vinylidene fluoride unit and a side-chain comprising an alkylene oxide unit and at least one of an acrylate unit and methacrylate unit as the host polymer.

Lithium polymer battery and method for producing the same

A lithium secondary battery is disclosed. The battery comprises a positive electrode, a negative electrode, an electrolyte solution comprising an electrolyte, a separator, and a ligand. The ligand is oriented at the interface of the electrolyte solution and the positive electrode and at the interface of the electrolyte solution and the negative electrode. The ligand has a cyclic structure having a pore that has a diameter of about 1.7 angstroms or more and coordinates lithium ions more strongly than either the solvent or the electrolyte. Typical ligands are coronands (crown ethers), podanocoronands (lariat ethers), cryptands, and spherands. The battery maintains high reliability and energy density, even after storage at high temperature.

Lithium secondary battery

In a lithium polymer secondary battery comprising: a positive electrode comprising a lithium-containing complex oxide; a negative electrode comprising a material capable of intercalating and deintercalating lithium ions; and a separator interposed between the positive electrode and the negative electrode, the weight Wp of the polymer material constituting the polymer electrolyte contained in the positive electrode, the weight Wn of the polymer material constituting the polymer electrolyte contained in the negative electrode, and the weight Ws of the polymer material constituting the polymer electrolyte contained in the separator satisfy all of the following: Ws<Wn<Wp, 20&lE;100Wp/(Wp&plus;Wn&plus;Ws)&lE;50, 20&lE;100Wn/(Wp&plus;Wn&plus;Ws)&lE;50, and 20&lE;100Ws/(Wp&plus;Wn&plus;Ws)&lE;50; so that a lithium polymer secondary battery which is excellent in cycle stability and high in reliability is provided.

Lithium polymer secondary cell

An organic electrolyte lithium secondary battery wherein lithium is an active material. The battery comprises a negative electrode made of metallic lithium or a lithium alloy and a separator made of a microporous polyolefin separator matrix whose pores are filled with an ionic conductive gel electrolyte. The separator is in the form of a sheet with at least one face contacting the negative electrode having a gel electrolyte layer. The gel electrolyte is formed by ultraviolet irradiation of a solution having a major component being a mixture of an oligomer and a monomer added to an organic electrolyte. Using the separator in an organic electrolyte lithium secondary battery internal short circuiting of the battery due to dendridic lithium growing on a negative electrode during the charging cycle can be prevented and a longer cycle life achieved.

Manufacturing method of a separator for a lithium secondary battery and

The present invention relates to a separator and spacer for use in non-aqueous inorganic electrolyte cells using oxyhalides as both a solvent and cathode active material, and an alkali metal as anode active material. There is provided a non-aqueous inorganic electrolyte cell which has a good discharge performance, preservability, and a safety to resist the charging at 5 V caused due to erroneous operations and accidents, by specifying a content of glass involved in the separator made of mainly glass fibers, specifying the type of synthetic resin of other components than glass fibers, or by specifying an oxyhalide absorbance of materials from which the separator and the spacer are produced.

Non-aqueous inorganic electrolyte cell

The invention relates to a nonaqueous electrochemical cell comprising an alkali metal anode, an oxyhalide or other cathode-electrolyte solvent which is liquid at ambient temperature, and a porous carbonaceous cathode collector, the cathode-electrolyte containing at least polyethylene terephthalate as an additive for minimizing the voltage delay, i.e. a large voltage drop in an initial stage of discharge.

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Hyogo, Japan

Kenichi Morigaki