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US 2022/0037699 A1Published application
Propylene Carbonate-Based Electrolyte For Lithium Ion Batteries With Silicon-Based Anodes
AssigneeApple Inc.
InventorsHyea Kim, OuJung Kwon, Woo Cheol Shin
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Abstract
An electrochemical cell has an anode comprising a silicon-based active material, a cathode comprising a cathode active material, and an electrolyte having no ethylene carbonate. The electrolyte comprises a solvent, the solvent being 20 wt % to 50 wt % propylene carbonate with the remainder being a linear solvent, a lithium salt, and less than 15 wt % of one or more additives. The silicon-based anode active material has a specific capacity of ≥700 mAh/g.
Claims17
An electrochemical cell, comprising:
- an anode comprising a silicon-based active material having a specific capacity of ≥700 mAh/g;
- a cathode comprising a cathode active material;
- and
- an electrolyte comprising:
- an ethylene carbonate-free solvent, the ethylene carbonate-free solvent being 20 wt % to 50 wt % propylene carbonate with the remainder being a linear solvent;
- a lithium salt;
- and
- less than 15 wt % of one or more additives.
5 more elements
An electrochemical cell, comprising:
- an anode comprising a silicon-based active material having a specific capacity of ≥700 mAh/g;
- a cathode comprising a cathode active material;
- and
- an electrolyte having no ethylene carbonate, the electrolyte comprising:
- a solvent, the solvent being 30 wt % propylene carbonate and 70 wt % diethyl carbonate;
- 1.15 M LiPF6;
- and
- less than 15 wt % of one or more additives.
5 more elements
An electrochemical cell, comprising:
- an anode comprising a silicon-based active material having a specific capacity of ≥700 mAh/g;
- a cathode comprising a cathode active material;
- and
- an electrolyte consisting of:
- a solvent, the solvent being 20 wt % to 50 wt % propylene carbonate with the remainder being a linear solvent;
- lithium salt selected from the group consisting of LiPF6, LiPF6 and LiFSI, or LiPF6 and LiTFSI, the lithium salt having a molar concentration of 0.7 M to 1.5 M;
- and
- less than 15 wt % of one or more additives.
5 more elements
Dependencies are inferred from the claim text.