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Lithium-iron disulfide battery

An iron disulfide battery and iron disulfide technology are applied in the field of lithium-iron disulfide battery non-aqueous electrolyte and lithium-iron disulfide battery, which can solve the problems of damaging positive electrode active materials, reducing battery discharge capacity, etc. Shelf life and discharge capacity, effect of inhibiting dissolution, inhibiting internal micro-short circuit

Inactive Publication Date: 2018-01-09
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during battery storage, Fe on the positive electrode 2+ It will always be dissociated, and will run to the negative electrode and be reduced to Fe, thus damaging the positive electrode active material FeS 2 Reduced battery discharge capacity

Method used

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  • Lithium-iron disulfide battery
  • Lithium-iron disulfide battery

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Use DME and DOL as solvents, the concentration of lithium bisfluorosulfonyl imide is 0.1mol / L, the concentration of lithium iodide is 0.4mol / L, and a small amount of additive DMI is added to prepare the non-aqueous electrolyte solution for primary lithium-iron batteries of this embodiment .

Embodiment 2

[0030] DME and DOL were used as solvents, the concentration of lithium bisfluorosulfonyl imide was 0.5 mol / L, and a small amount of additive DMI was added to prepare the non-aqueous electrolyte solution for the primary lithium-iron battery of this embodiment.

Embodiment 3

[0032] Use DME and DOL as solvents, the concentration of lithium bisfluorosulfonyl imide is 1.0mol / L, the concentration of lithium iodide is 1.0mol / L, and a small amount of additive DMI is added to prepare the non-aqueous electrolyte solution for primary lithium-iron batteries of this embodiment .

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PUM

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Abstract

The invention discloses a lithium-iron disulfide battery, which comprises iron disulfide (FeS2) as an anode, lithium or lithium alloy as a cathode and a partition board between the anode and the cathode, and further comprises non-aqueous electrolyte, wherein the non-aqueous electrolyte comprises a non-aqueous organic solvent and electrolyte salt; and the electrolyte salt at least includes lithiumbis(fluorosulfonyl)imide (LiFSI). The lithium-iron disulfide battery utilizes LiFSI to form a layer of protective film on the anode of a lithium iron battery, so that the dissolution of Fe2+ on the anode is effectively inhibited, and the components of a passive film at the cathode is changed, so that the stability of the passive film at the cathode is improved, and thus the occurrence of micro short circuit of the lithium iron battery in a storage process is inhibited, and the storage life and the discharge capacity of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium primary batteries, in particular to a battery containing iron disulfide (FeS 2 ) lithium-iron disulfide battery and lithium-iron disulfide battery non-aqueous electrolyte of cathode material. Background technique [0002] Lithium primary batteries, that is, primary lithium batteries, have been in recent years due to the continuous market demand due to their advantages such as high primary capacity, extremely low self-discharge rate (can be stored at room temperature for 5-10 years), slow discharge level, and good model standardization and versatility. Scaling has taken off, and in today's consumer-driven device market, a standardized primary lithium battery size (such as AA or AAA) and a specific voltage rating (typically 1.5V) is preferred. A lithium battery particularly used in 1.5V consumer devices is lithium-iron disulfide (or Li / FeS 2 ) batteries with IEC standards for size AA and FR03 stan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16
CPCH01M6/16
Inventor 谭光平石桥赵宝顺李兆鹏陈燃
Owner SHENZHEN CAPCHEM TECH CO LTD
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