Invention Grant
- Patent Title: Lithium ion batteries with long cycling performance
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Application No.: US12509131Application Date: 2009-07-24
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Publication No.: US10056644B2Publication Date: 2018-08-21
- Inventor: Sujeet Kumar , James P. Buckley , Hang Shi
- Applicant: Sujeet Kumar , James P. Buckley , Hang Shi
- Applicant Address: US CA Fremont
- Assignee: Zenlabs Energy, Inc.
- Current Assignee: Zenlabs Energy, Inc.
- Current Assignee Address: US CA Fremont
- Agency: Christensen, Fonder, Dardi & Herbert PLLC
- Agent Peter S. Dardi
- Main IPC: H01M10/0525
- IPC: H01M10/0525 ; H01M4/36 ; H01M4/505 ; H01M4/525 ; H01M4/58 ; H01M4/587 ; C01G53/00 ; H01M2/02

Abstract:
Batteries with high energy and high capacity are described that have a long cycle life upon cycling at a moderate discharge rate. Specifically, the batteries may have a room temperature fifth cycle discharge specific energy of at least about 175 Wh/kg discharged at a C/3 discharge rate from 4.2V to 2.5V. Additionally, the batteries can maintain at least about 70% discharge capacity at 1000 cycles relative to the fifth cycle, with the battery being discharged from 4.2V to 2.5V at a C/2 rate from the fifth cycle through the 1000th cycle. In some embodiment, the positive electrode of the battery comprises a lithium intercalation composition with optional metal fluoride coating. Stabilizing additive maybe added to the electrolyte of the battery to further improve the battery performance. The batteries are particularly suitable for use in electric vehicles.
Public/Granted literature
- US20110017528A1 LITHIUM ION BATTERIES WITH LONG CYCLING PERFORMANCE Public/Granted day:2011-01-27
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