# US 12,183,924 B2 · Metal organic framework-derived carbon aerogel, preparation method thereof and application in lithium ion batteries

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- Number: US 12,183,924 B2
- Document ID: US12183924B2
- Status: Granted
- Kind: B2
- Application number: 18/795,604
- Filed: 2024-08-06
- Published: 2024-11-28
- Granted: 2024-12-31
- Earliest claimed: 2023-02-23
- Assignees: Soochow MOFs Science and Technology Ltd.
- Applicants: Soochow MOFs Science and Technology Ltd.
- Inventors: Zuoxi Li; Xiang Fang; Liying Zhang
- Web page: https://patentgrep.com/patent/US12183924B2

## CPC

- H01M 4/587: for inserting or intercalating light metals
- H01M 4/60: of organic compounds
- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- C07F 3/003: {without C-Metal linkages}
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/139: Processes of manufacture
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- C01P 2004/03: obtained by SEM
- C01P 2006/10: Solid density
- C01P 2006/40: Electric properties
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The disclosure relates to the technical field of lithium ion batteries, and provides an MOF-derived carbon aerogel, a preparation method thereof and an application in lithium ion batteries. According to the method, [Cd(tppa)2Cl2] is first prepared. The MOF-derived carbon aerogel according the disclosure is used as an anode active material of lithium ion batteries.

## Claims

### Claim 1

A preparation method of an MOFs-derived carbon aerogel, comprising following steps:
mixing a dichloromethane solution of tris(4-(pyridin-4-yl)phenyl)amine and a methanol solution of CdCl2 for coordination reaction to obtain [Cd(tppa)2Cl2]; and performing carbonization of the [Cd(tppa)2Cl2] under a protective atmosphere to obtain the MOFs-derived carbon aerogel, wherein a molar ratio of the tris(4-(pyridin-4-yl)phenyl)amine to CdCl2 is 6-8:2-3, a temperature of the coordination reaction is room temperature;
a mode of mixing the dichloromethane solution of tris(4-(pyridin-4-yl)phenyl)amine and the methanol solution of CdCl2 comprises a first mode or a second mode; the first mode comprises following steps: dropwise adding the dichloromethane solution of tris(4-(pyridin-4-yl)phenyl)amine into the methanol solution of CdCl2;
the second mode comprises following steps: putting the dichloromethane solution of tris(4-(pyridin-4-yl)phenyl)amine at a bottom of a reaction vessel, then adding a dichloromethane-methanol mixed solution, and then adding the methanol solution of CdCl2;
when a method of the first mode is used for mixing, a duration of the coordination reaction is 20-30 h; when a method of the second mode is used for mixing, a duration of the coordination reaction is 24-27 days;
the [Cd(tppa)2Cl2] is a powder crystal or a single crystal; crystal data of the single crystal is: belonging to monoclinic system P21/c, and an asymmetric unit comprises one CdII ion, two ligand tppa molecules and two chloride ions.

### Claim 2 (depends on 1)

The preparation method according to claim 1, wherein a temperature of the carbonization is 800-1000° C. and a heat preservation duration is 3-4 h; and the protective atmosphere is nitrogen.

### Claim 3 (depends on 1)

An MOFs-derived carbon aerogel prepared by the preparation method according to claim 1, wherein a density of the MOFs-derived carbon aerogel is 0.2-0.4 mg/cm3, and a porosity is 85-95%.

### Claim 4 (depends on 3)

A lithium ion battery anode, wherein an anode active material used by the lithium ion battery anode is the MOFs-derived carbon aerogel according to claim 3.

### Claim 5 (depends on 4)

The lithium ion battery anode according to claim 4, wherein the lithium ion battery anode comprises a current collector and an active material layer coated on a surface of the current collector; compositions of the active material layer comprise an anode active material, a conductive agent and a binder.

### Claim 6 (depends on 4)

A lithium ion battery, wherein an anode of the lithium ion battery is the lithium ion battery anode according to claim 4.