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Anode materials for lithium ion batteries and methods of making and using same

專利號
US11177471B2
公開日期
2021-11-16
申請人
JOHNSON MATTHEY PUBLIC COMPANY LIMITED（GB London）
發(fā)明人
Fuxia Sun
IPC分類
H01M4/36; H01M4/62; H01M10/0525; H01M4/134; H01M4/38; C22C24/00; C22C28/00; H01M4/02
技術領域
alloy,no3,silicon,ee,wt,electrode,lipaa,lithium,metal,coated
地域： London

摘要

An electrochemically active material includes a silicon alloy material having the formula: SiwM1xCyOz, where w, x, y, and z represent atomic % values and w+x+y+z=1; M1 comprises a transition metal; w>0; x>0; y≥0; and z≥0. The electrochemically active material also includes a metal-based material having the formula: M2aObAc, where a, b, and c represent atomic % values and a+b+c=1; M2 comprises a metal; A is an anion; a>0; b≥0; and c≥0.

說明書

FIG. 13 shows the X-ray diffraction pattern of the bulk MnO nanoparticle powder of one aspect of the present disclosure.

FIG. 14 shows normalized charge capacity as a function of cycling of coin half cells containing metal based material coated silicon alloys of the present disclosure compared to coin half cells containing uncoated silicon alloys.

FIG. 15 shows normalized charge capacity as a function of cycling of coin half cells containing metal based material coated silicon alloys of the present disclosure compared to coin half cells containing uncoated silicon alloys.

DETAILED DESCRIPTION

Electrochemical energy storage has become an important technology for a variety of applications, including grid storage, electric vehicles, and portable electronic devices. The lithium-ion battery is an attractive energy storage device because of its relatively high energy density and good rate capability. To further increase the energy density for more demanding applications, however, new electrode materials with higher specific and volumetric capacity are desired.

To meet the increasing demand for energy storage capability, electrode materials with higher capacity, low manufacturing cost, and the ability to be produced at large scale have been sought. Alloy-type anodes (such as Si, Ge, Sn, Al, Sb, Pb, P, B, As, and In) have much higher lithium (Li) storage capacity than the intercalation-type graphite anode that is currently used in Li-ion batteries. Among all the alloy anodes, silicon has the highest specific capacity.

權利要求

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