IP Library › Granted Patent US 12,308,389
Granted Patent B2
US 12,308,389 · App. 18/401,146 · Granted May 20, 2025

Electrochemical cell with TMCCC electrodes in an acetonitrile solvent including a dinitrile additive

Inventors: Majid Keshavarz (Pleasanton, CA); Daniel Friebel (San Carlos, CA); Peter Benjamin Herman (San Jose, CA); Grace Marjorie Yee (San Francisco, CA); Alex J. Klevay (San Jose, CA)
Assignee: Natron Energy, Inc.
H01M10/0567H01M10/0569H01M2300/0028
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Quick Facts
Patent No.
US 12,308,389
App. No.
18/401,146
Granted
May 20, 2025
Kind
B2
Abstract

A system and method for a liquid electrolyte used in secondary electrochemical cells having at least one electrode including a TMCCC material, the liquid electrolyte enabling an increased lifetime while allowing for fast discharge to extremely high depth of discharge. The addition of dinitriles to liquid electrolytes in electrochemical cells in which energy storage is achieved by ion intercalation in transition metal cyanide coordination compounds (TMCCC) has the advantage of increasing device lifetime by inhibiting common chemical and electrochemical degradation mechanisms.

Claims (18)

1. An electrochemical structure, comprising:

an electrolyte;

an electrically conductive structure in electrochemical communication with said electrolyte; and

wherein said electrically conductive structure includes a transition metal cyanide coordination compound material;

wherein said electrolyte includes a set of solvents and a set of alkali metal salts in solution with one or more solvents of said set of solvents, and an additive disposed within one or more solvents of said set of solvents;

wherein at least one solvent of said set of solvents includes a methyl cyanide including a linear alkane or alkene group and wherein said additive includes a linear alkane or alkene different from said linear alkane or alkene group of said methyl cyanide;

wherein said additive includes a dinitrile material;

wherein said transition metal cyanide coordination compound material includes a composition A x P y [R(CN) (6) ] z n(H 2 O), wherein A includes an alkali metal cation, wherein P includes a transition metal cation, wherein R includes a transition metal cation, and wherein 0≤x≤2, y=1, 0.75≤z≤1, and 0≤n≤6; and

wherein R includes Mn; and

wherein said electrolyte further includes a quantity Q of water, Q>0.

2. The electrochemical structure of claim 1 in which said dinitrile material includes a linear dinitrile material.

3. The electrochemical structure of claim 2 in which said linear dinitrile material includes succinonitrile.

4. The electrochemical structure of claim 2 in which said linear dinitrile material includes adiponitrile.

5. The electrochemical structure of claim 1 having a weight ratio N of said solvent to said additive wherein 70:30<N<99:1.

6. The electrochemical structure of claim 1 wherein A includes one or more of Li, Na, K, Rb, and Cs cations.

7. The electrochemical structure of claim 1 wherein P of said electrically conductive structure includes at least one of manganese and iron.

8. The electrochemical structure of claim 1 wherein said at least one solvent includes acetonitrile.

9. The electrochemical structure of claim 3 wherein said at least one solvent includes acetonitrile.

Assignments (8)
SECURITY INTEREST Recorded Sep 10, 2025
From: NATRON (ASSIGNMENT FOR THE BENEFIT OF CREDITORS), LLC
To: MERCURIA INVESTMENTS US, INC.
Reel/Frame 072829/0132 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 8, 2025
From: NATRON ENERGY, INC.
To: NATRON (ASSIGNMENT FOR THE BENEFIT OF CREDITORS), LLC
Reel/Frame 072836/0466 →
SECURITY INTEREST Recorded Jun 3, 2025
From: NATRON INTERMEDIATE, INC.; NATRON HOLDINGS, INC.; NATRON ENERGY, INC.
To: MERCURIA INVESTMENTS US, INC.
Reel/Frame 071480/0329 →
RELEASE OF SECURITY INTEREST Recorded Apr 1, 2025
From: MERCURIA INVESTMENTS US, INC.
To: NATRON ENERGY, INC.
Reel/Frame 070705/0013 →
RELEASE OF SECURITY INTEREST Recorded Nov 26, 2024
From: NANODIMENSION III, L.P.; NANODIMENSION IV, L.P.; ND CAPITAL OPPORTUNITY FUND I, L.P.; THE EIGER TRUST
To: NATRON ENERGY, INC.
Reel/Frame 069450/0867 →
SECURITY INTEREST Recorded Aug 21, 2024
From: NATRON ENERGY, INC.
To: MERCURIA INVESTMENTS US, INC.
Reel/Frame 068748/0393 →
SECURITY INTEREST Recorded Aug 8, 2024
From: NATRON ENERGY, INC.
To: NANODIMENSION III, L.P.; NANODIMENSION IV, L.P.; ND CAPITAL OPPORTUNITY FUND I, L.P.; THE EIGER TRUST
Reel/Frame 068520/0081 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 29, 2023
From: KESHAVARZ, MAJID, MR.; FRIEBEL, DANIEL, DR.; HERMAN, PETER BENJAMIN, MR.; YEE, GRACE MARJORIE, MS.; KLEVAY, ALEX J., MR.
To: NATRON ENERGY, INC.
Reel/Frame 065985/0406 →
Continuity (5)
Continuation 18221724 · Jul 13, 2023
Continuation 18054464 · Nov 10, 2022
Continuation 17650357 · Feb 8, 2022
Continuation 16898692 · Jun 11, 2020
Related Publication 20240194946A1 · Jun 13, 2024
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