US 10,374,255 B2Granted

Nonaqueous electrolyte secondary battery

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsTomohiro Nakano, Satoshi Goto, Tomohide Sumi, Hideki Sano

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Abstract

Provided is a nonaqueous electrolyte secondary battery in which the following are housed in a battery case: a nonaqueous electrolyte, a boron atom-containing oxalato complex compound, and an electrode assembly in which a positive electrode having a positive electrode active material and a negative electrode having a negative electrode active material are disposed facing each other. Here, a coat containing boron atoms originating from the oxalato complex compound is formed on the surface of the negative electrode active material, and the amount BM (μg/cm2) of the boron atom as measured based on inductively coupled plasma-atomic emission spectroscopic analysis and the intensity BA for a tricoordinate boron atom as measured based on x-ray absorption fine structure analysis satisfy 0.5≤BA/BM≤1.0.

Claims8

Dependent claims

A nonaqueous electrolyte secondary battery in which an electrode assembly in which a positive electrode having a positive electrode active material and a negative electrode having a negative electrode active material are disposed facing each other,

a nonaqueous electrolyte, and
a boron (B) atom-containing oxalato complex compound are housed in a battery case, wherein
a coat containing boron (B) atoms that originate from the oxalato complex compound is formed on the surface of the negative electrode active material, and
a ratio on the surface of the negative electrode active material between an amount BM (μg/cm2) of the boron atom, as measured based on inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and an intensity BA for a tricoordinate boron (B) atom, as measured based on x-ray absorption fine structure (XAFS) analysis, is 0.5≤BA/Bm≤1.0.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/402,757Filed 30 Apr 2013
Priority: JP 2012-11677522 May 2012
Published: US 2015/0147630 A128 May 2015
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 10/0567
Liquid materials: characterised by the additives
H01M 4/13
Electrodes composed of, or comprising, active material: electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators;…
H01M 4/139
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: processes of manufacture
H01M 4/628
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers: inhibitors, e.g. gassing inhibitors, corrosion inhibitors

Family

US 2015/0147630 A1Pre-grant publication · published 28 May 2015
US 10,374,255 B2This patent

From the US filing history. Foreign family members aren’t listed.

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