Battery and battery system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsRyo ASAKURA, Shinya SHIOTANI
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Abstract
Batteries using a positive electrode mixture including a sulfur-based positive electrode active material have room for improvement in terms of capacity and cycle characteristics. The battery includes a positive electrode mixture layer, an electrolyte layer, and a negative electrode. The positive electrode mixture layer includes a sulfur-based active material and a P-containing sulfide. A 31P solid-state NMR spectrum of the positive electrode mixture layer satisfies the relationship I1/I2≤8.5 (I1: integrated intensity of peak originating from PS43−, I2: integrated intensity of peak originating from reduction product).
Claims5
A battery, comprising a positive electrode mixture layer, an electrolyte layer, and a negative electrode, wherein
- the positive electrode mixture layer comprises a sulfur-based active material and a P-containing sulfide, and
- a 31P solid-state NMR spectrum of the positive electrode mixture layer satisfies relationship (1) below:
- I
-
- 1
- /
- I
-
- 2
- ?
- 8.5
- (
- 1
- )
- I1:
- integrated intensity of peak originating from PS43−
- I2:
- integrated intensity of peak originating from reduction product.
A battery system, comprising a battery and a control unit, wherein
- the battery comprises a positive electrode mixture layer, an electrolyte layer, and a negative electrode, wherein
- the positive electrode mixture layer comprises a sulfur-based active material and a P-containing sulfide, and
- the control unit controls discharging of the battery so that cutoff potential of the positive electrode mixture layer of the battery is any potential between 1.0 V vs. Li+/Li or more and less than 1.5 V vs. Li+/Li.
Dependencies are inferred from the claim text.