PHOTO-ASSISTED FAST CHARGING OF LITHIUM MANGANESE OXIDE SPINEL (LiMn2O4) IN LITHIUM-ION BATTERIES

Patent metadata

Field	Value
Publication number	US-2023307729-A1
Application number	US-202318196350-A
Country	US
Kind code	A1
Filing date	May 11, 2023
Priority date	Jul 19, 2016
Publication date	Sep 28, 2023
Grant date	—

Abstract

A process for charging a discharged electrochemical cell includes applying a voltage bias to the discharged electrochemical cell; and illuminating the cathode with a light source.

First claim

1 - 14 . (canceled)

15 . A method of generating Mn 4+ in an electrode of an electrochemical cell, the method comprising applying a charging current to the electrochemical cell, and simultaneously illuminating the electrode with visible light;
wherein the electrode comprises an active material comprising manganese.

16 . The method of claim 15 , wherein the electrode is a cathode.

17 . The method of claim 15 , wherein applying the charging current to the electrochemical cell and simultaneously illuminating the electrode with visible light generates Mn 4+ in the electrode at a faster rate than the same electrochemical cell in the absence of illumination.

18 . The method of claim 16 , wherein the cathode comprises LiMn 0.5 Ni 0.5 O 2 , LiMn 1/3 Co 1/3 Ni 1/3 O 2 , LiMn 2 O 4 , LiFeO 2 , LiM 4 0.5 Mn 1.5 O 4 , or Li 1+x″ Ni α Mn β Co γ M 5 δ′ O 2−z″ F z″ ;
wherein:
M 4 is Al, Mg, Ti, B, Ga, Si, Mn, or Co;
M 5 is Mg, Zn, Al, Ga, B, Zr, or Ti;
0≤x″≤0.4; 0≤α≤1; 0≤β≤1; 0≤γ≤1; 0≤δ′≤0.4; and 0≤z″≤0.4;
with the proviso that at least one of α, β and γ is greater than 0.

19 . The method of claim 17 , wherein the cathode comprises LiMn 0.5 Ni 0.5 O 2 , LiMn 1/3 Co 1/3 Ni 1/3 O 2 , LiMn 2 O 4 , LiCr 0.5 Mn 1.5 O 4 , LiCrMnO 4 , LiFe 0.5 Mn 1.5 O 4 , LiCoMnO 4 , LiNi 0.5 Mn 1.5 O 4 , LiMnPO 4 , or Li 2 MnO 3 .

20 . The method of claim 15 , wherein illuminating the electrode comprises illuminating the electrode with an externally powered light source.

21 . The method of claim 20 , wherein the externally powered light source is a broadband white light source.

22 . The method of claim 20 , wherein the externally powered light source is a monochromatic light source.

23 . The method of claim 20 , wherein the externally powered light source is a light emitting diode, a xenon lamp, a laser, or optical fiber.

24 . The method of claim 23 , wherein the externally powered light source is a light emitting diode.

25 . The method of claim 15 , wherein the electrochemical cell is a lithium ion battery, a sodium ion battery, or a magnesium ion battery.

26 . The method of claim 15 , wherein generating Mn 4+ in the electrode comprises oxidizing Mn 3+ to Mn 4+ in the electrode.

27 . The method of claim 26 , further comprising, while generating Mn 4+ , ejecting a cation from the electrode.

28 . The method of claim 26 , further comprising, while generating Mn 4+ , ejecting Li + from the electrode.

29 . A method of generating Mn 4+ in an electrode of an electrochemical cell, the method comprising applying an external voltage bias to the electrochemical cell, and simultaneously illuminating the electrode with visible light;
wherein applying the external voltage bias to the electrochemical cell and simultaneously illuminating the electrode with visible light generates Mn 4+ in the electrode at a faster rate than the same electrochemical cell in the absence of illumination.

Assignees

• Uchicago Argonne Llc

Inventors

• Johnson Christopher S
• Lee Anna

Classifications

• H01M10/44 Primary

  Methods for charging or discharging (circuits for charging H02J7/00) · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title