# US 12,770,920 B2 · Synergistic additives for high volume lithium ion batteries

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- Number: US 12,770,920 B2
- Document ID: US12770920B2
- Status: Granted
- Kind: B2
- Application number: 17/950,419
- Filed: 2022-09-22
- Published: 2023-04-06
- Granted: 2026-10-20
- Earliest claimed: 2021-09-24
- Assignees: Apple Inc.
- Applicants: Apple Inc.
- Inventors: Hongli Dai; Jongho Jeon; Libo Hu; Mingfu He; Qian Liu; Zhengcheng Zhang
- Web page: https://patentgrep.com/patent/US12770920B2

## CPC

- H01M 10/0567: characterised by the additives
- H01M 4/0404: {by coating on electrode collectors}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0568: characterised by the solutes
- H01M 10/0569: characterised by the solvents
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M 2300/0028: characterised by the solvent
- H01M 2300/0051: Carbonates
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

This disclosure relates generally to battery cells, and more particularly, electrolyte additives for use in lithium ion battery cells.

## Claims

### Claim 1

A battery cell comprising:
a cathode comprising a cathode active material disposed on a cathode current collector;
an anode comprising an anode active material disposed on an anode current collector, the anode oriented towards the cathode such that the anode active material faces the cathode active material;
a separator disposed between the cathode active material and the anode active material; and
an electrolyte fluid comprising 0.6-0.8 wt % lithium difluoro(oxalato)borate (LiDFOB), 3.0-4.0 wt % butane sultone (BS), 0.2 wt % prop-1-ene-1,3-sultone (PES) 0.4-0.6 wt % methylene methanedisulfonate (MMDS), 0.1-0.3 wt % tris(trimethylsilyl)borate (TMSB), 3.5-4.5 wt % fluoroethylene carbonate (FEC), 1.5-2.5 wt % succinonitrile (SN), and 2.5-3.5 wt % 1,3,6-hexanetricarbonitrile (HTCN), LiPF6, ethylene carbonate (EC), propylene carbonate (PC), propyl propionate (PP), and ethyl propionate (EP).

### Claim 2 (depends on 1)

The battery cell of claim 1, further comprising 0.7 wt % LiDFOB, 3.5 wt % BS, 0.2 wt % PES, 0.5 wt % MMDS, 0.2 wt % TMSB, 4.0 wt % FEC, 2.0 wt % SN, and 3.0 wt % HTCN.

### Claim 3 (depends on 1)

The electrolyte fluid of claim 1, wherein the LiPF6 is from 0.8 M to 1.6 M.