National Institute of Advanced Industrial Science and Technology

Hisanori Ando

Masaru Yao

Toshikatsu Kojima

Hiroshi Senoh

Hikaru Sano

Nobuhiko Takeichi

Tetsu Kiyobayashi

An electrode active material for non-aqueous secondary batteries containing a compound represented by formula (1) is a material that is less likely to dissolve in an electrolyte during charge and discharge, and that exhibits an excellent discharge capacity and excellent charge-and-discharge cycle characteristics: the compound represented by formula (1) wherein Yand Yare identical or different and represent an oxygen atom, a sulfur atom, or a selenium atom, Rto Rare identical or different and represent an oxygen atom or a group represented by &#x2014;OLi, Rto Rare identical or different and represent a hydrogen atom or an organic group, and bonds that are each represented by a solid line and a dashed line indicate a single bond or a double bond.

Electrode active material for nonaqueous secondary batteries, and nonaqueous secondary battery using same

An organic sulfur material comprising carbon, hydrogen, oxygen, and sulfur as constituent elements, and having peaks in the vicinity of 482 cm&#x2212;1, 846 cm&#x2212;1, 1066 cm&#x2212;1, 1279 cm&#x2212;1, and 1442 cm&#x2212;1 in a Raman spectrum detected by Raman spectroscopy, the peak in the vicinity of 1442 cm&#x2212;1 being most intense, has a high capacity and high heat resistance, although a liquid organic starting material is used.

Organic sulfur material and method for producing same

A rocking-chair nonaqueous secondary battery, which uses an ion other than monatomic ions as a charge carrier, and in which the ion moves in and out of both the positive electrode and the negative electrode, can be provided by using a nonaqueous secondary battery electrolyte comprising a salt containing a charge carrier comprising a molecular ion. The nonaqueous secondary battery further comprises a positive electrode containing a positive electrode active material, and a negative electrode containing a negative electrode active material, wherein the positive electrode active material and the negative electrode active material are both materials that allow doping and dedoping of molecular anions (e.g., conductive polymers, organic radical polymers, polymers having a ferrocene skeleton, conductive carbon materials, or organic sulfur compounds), or the positive electrode active material and the negative electrode active material are both materials that allow doping and dedoping of molecular cations (e.g., inorganic active materials, redox active molecules having a carbonyl group, redox active molecules having an imine skeleton, or redox active molecules containing a sulfur atom).

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Osaka, Japan

Hisanori Ando