Xujie Chen

US Patent:

20230015888, Jan 19, 2023

Filed:

Sep 20, 2022

Appl. No.:

17/948644

Inventors:

- Wakefield MA, US
Jin Yan - Boston MA, US
Ki T. Park - Chestnut Hill MA, US
Ting Du - Quincy MA, US
Xujie Chen - Quincy MA, US
Wanjun Ben Cao - Boston MA, US

International Classification:

H01M 4/62
H01M 4/131
H01M 4/525
C01B 32/174
H01M 10/0525
C08K 3/04
H01M 4/505
H01M 4/36
H01M 4/485

Abstract:

Disclosed herein is an apparatus comprising an electrode active layer comprising a network of high aspect ratio carbon elements defining void spaces within the network; a plurality of electrode active material particles disposed in the void spaces within the network and enmeshed in the network; and a surface treatment on the surface of the high aspect ratio carbon elements which promotes adhesion between the high aspect ratio carbon elements and the active material particles.

US Patent:

20210265634, Aug 26, 2021

Filed:

May 10, 2021

Appl. No.:

17/316037

Inventors:

- Boston MA, US
Jin Yan - Boston MA, US
Ki T. Park - Chestnut Hill MA, US
Ting Du - Quincy MA, US
Xujie Chen - Quincy MA, US
Wenjun Ben Cao - Boston MA, US

International Classification:

H01M 4/62
H01M 4/131
H01M 4/525
H01M 4/505
H01M 4/36
H01M 10/0525
C08K 3/04
C01B 32/174

Abstract:

An electrode active layer is disclosed that includes a network of high aspect ratio carbon elements (e.g., carbon nanotubes, carbon nanotube bundles, graphene flakes, or the like) that provides a highly electrically conductive scaffold that entangles or enmeshes the active material, thereby supporting the layer. A surface treatment can be applied to the high aspect ratio carbon elements to promote adhesion to the active material and any underlying electrode layers improving the overall cohesion and mechanical stability of the active layer. This surface treatment forms only a thin (in some cases even monomolecular) layer on the network, leaving the large void spaces that are free of any bulk binder material and so may instead be filled with active material. The resulting active layer may be formed with excellent mechanical stability even at large thickness and high active material mass loading.

US Patent:

20190318882, Oct 17, 2019

Filed:

Apr 16, 2019

Appl. No.:

16/385626

Inventors:

- Tallahassee FL, US
Xujie Chen - Tallahassee FL, US
Jian-Ping Zheng - Tallahassee FL, US
Annadanesh Shellikeri - Tallahassee FL, US
Mark Andrew Hagen - Tallahassee FL, US

International Classification:

H01G 11/06
H01G 11/50
H01G 11/52
H01G 11/60
H01G 11/46
H01G 11/38
H01G 11/24
H01G 11/86
H01G 11/62

Abstract:

A hybrid lithium-ion battery-capacitor (H-LIBC) energy storage device includes a hybrid composite cathode electrode having a lithium ion battery (LIB) cathode active material and a lithium ion capacitor (LIC) cathode active material. An anode electrode having a surface is pre-loaded and pressed with a lithium (Li) thin film source. The anode electrode is pre-lithiated with the lithium film source by positioning the Li film source on the surface of anode electrode after electrolyte filling and soaking processes, A separator and an organic solvent electrolytic solution including a lithium salt electrolyte are also provided. A method of making a hybrid lithium-ion battery-capacitor and a method of making a hybrid composite cathode for a hybrid lithium-ion battery-capacitor are also disclosed.

US Patent:

20190287736, Sep 19, 2019

Filed:

Mar 14, 2019

Appl. No.:

16/353936

Inventors:

- Tallahassee FL, US
Wanjun Ben Cao - Tallahassee FL, US
Xujie Chen - Tallahassee FL, US

International Classification:

H01G 11/06
H01G 11/32
H01G 11/52
H01G 11/60
H01G 11/86

Abstract:

Ultra-thin lithium ion capacitors with ultra-high power performance are provided. Ultra-thin electrodes and ultra-thin lithium films can be used for the ultra-thin lithium ion capacitor. A lithium ion capacitor can include a first positive electrode and a second positive electrode, a negative electrode disposed between the first positive electrode and the second positive electrode, a first lithium film disposed between the first positive electrode and the negative electrode, and a second lithium film disposed between the second positive electrode and the negative electrode. Each of the first and second lithium films can include an electrolyte. In addition, at least one separator can be provided between the first positive electrode and the first lithium film, and at least one separator can be provided between the second positive electrode and the second lithium film.

US Patent:

20180374656, Dec 27, 2018

Filed:

Jun 12, 2018

Appl. No.:

16/005777

Inventors:

- Tallahassee FL, US
Wanjun Ben Cao - Tallahassee FL, US
Xujie Chen - Tallahassee FL, US
William Brandt - Tallahassee FL, US

Assignee:

GENERAL CAPACITOR, LLC - Tallahassee FL

International Classification:

H01G 11/06
H01G 11/52
H01G 11/62
H01G 11/34
H01G 11/38
H01G 11/86

Abstract:

A lithium-ion capacitor (LIC) is provided which includes positive electrodes, negative electrodes pre-loaded on surface with lithium sources including lithium strips and ultra-thin lithium films having holes, separators and organic solvent electrolyte with lithium salt for high performance including high energy density, high power density, long cycle life, long DC life and wide temperature ranges. A method for making an LIC is also provided, where cell components important to optimize the electrochemical performance of LIC's are configured, said components include PE active material and binders, NE active material and binders, thickness/mass ratio of positive electrode (PE) to negative electrode (NE) active layers, PE and NE's size designs and layer numbers, types of material for Separators and NE pre-lithiation methods, NE pre-lithiation includes loading various lithium (Li) sources including lithium strips and ultra-thin lithium films having holes onto the surface of NE.

US Patent:

20170301945, Oct 19, 2017

Filed:

Jun 28, 2017

Appl. No.:

15/635777

Inventors:

- Tallahassee FL, US
Petru Andrei - Tallahassee FL, US
Annadanesh Shellikeri - Tallahassee FL, US
Xujie Chen - Tallahassee FL, US

International Classification:

H01M 8/20
H01M 8/04276
H01M 4/38
H01M 12/08
H01M 4/96

Abstract:

A metal air flow battery includes an electrochemical reaction unit and an oxygen exchange unit. The electrochemical reaction unit includes an anode electrode, a cathode electrode, and an ionic conductive membrane between the anode and the cathode, an anode electrolyte, and a cathode electrolyte. The oxygen exchange unit contacts the cathode electrolyte with oxygen separate from the electrochemical reaction unit. At least one pump is provided for pumping cathode electrolyte between the electrochemical reaction unit and the oxygen exchange unit. A method for producing an electrical current is also disclosed.

US Patent:

20150125763, May 7, 2015

Filed:

Apr 30, 2013

Appl. No.:

14/398681

Inventors:

- Tallahassee FL, US
Petru Andrei - Tallahassee FL, US
Annadanesh Shellikeri - Tallahassee FL, US
Xujie Chen - Tallahassee FL, US

Assignee:

Florida State University Research Foundation - Tallahassee FL

International Classification:

H01M 12/08
H01M 4/90
H01M 8/04

US Classification:

429405, 429407

Abstract:

A metal air flow battery includes an electrochemical reaction unit and an oxygen exchange unit. The electrochemical reaction unit includes an anode electrode, a cathode electrode, and an ionic conductive membrane between the anode and the cathode, an anode electrolyte, and a cathode electrolyte. The oxygen exchange unit contacts the cathode electrolyte with oxygen separate from the electrochemical reaction unit. At least one pump is provided for pumping cathode electrolyte between the electrochemical reaction unit and the oxygen exchange unit. A method for producing an electrical current is also disclosed.