Abstract: A method for making a thin film lithium ion battery is provided. A cathode material layer and an anode material layer are provided. A first carbon nanotube layer is formed on a surface of the cathode material layer to obtain a cathode electrode. A second carbon nanotube layer is formed on a surface of the anode material layer to obtain an anode electrode. A solid electrolyte layer is applied between the cathode electrode and the anode electrode to form a battery cell. At least one battery cell is then encapsulated in an external encapsulating shell.

Abstract: A lithium ion battery includes at least one cathode electrode, at least one anode electrode, and an electrolyte. The cathode electrode includes at least one first carbon nanotube paper and at least one cathode electrode plate. The cathode electrode plate locates on a surface of the at least one first carbon nanotube paper, and includes a plurality of stacked first carbon nanotube films. A cathode active material is dispersed in the plurality of first carbon nanotube films. An anode electrode includes at least one first second carbon nanotube paper and at least one first anode electrode plate. The anode electrode plate is located on a surface of the at least one first second carbon nanotube paper, and includes a plurality of stacked second carbon nanotube films. An anode active material is dispersed in the plurality of second carbon nanotube films.

Abstract: The present disclosure relates to a carbon nanotube sponge comprising: a plurality of carbon nanotubes combined by van der Waals force to form a free-standing structure, wherein a plurality of micropores are defined by adjacent carbon nanotubes; and a plurality of carboxyl groups and hydroxyl groups located on surfaces of the plurality of carbon nanotubes; wherein a weight percentage of the carboxyl groups in the carbon nanotube sponge ranges from about 10% to about 20%, and a weight percentage of the hydroxyl groups in the carbon nanotube sponge ranges from about 5% to about 15%.

Abstract: A thin film lithium ion battery includes a cathode electrode, an anode electrode, and a solid electrolyte layer. The solid electrolyte layer is sandwiched between the cathode electrode and the anode electrode. At least one of the cathode electrode and the anode electrode includes a current collector. The current collector is a carbon nanotube layer consisting of a plurality of carbon nanotubes.

Abstract: Disclosed is a computer-implemented method for recommending booths-to-visit to a user. The method includes: accessing a map database of an exhibition; accessing a history database that stores a plurality of records indicative of booths visited by a previous visitor in the exhibition; accessing a user record that includes data indicative of the booths which the user has visited; determining similarity level between each record in the history database and the user record, selecting one of the records according to the determined similarity level so as for the selected record to function as a reference record, usable to determine the booths not yet visited by the user; obtaining the user's current location in the exhibition, and determining a target booth, from the booths not yet visited by the user, by referring to the current location and the map database; and sending to the user a message indicative of the target booth.

Abstract: A digital transaction method is applied in a user device. The user device instructs a digital transaction management server system to bind a device identification code of the user device and an order after the user device purchases with the digital transaction management server system and accordingly obtains the order. The user device generates a digital certification and a safety code, wherein the safety code varies according to a predetermined varying sequence during a predetermined time interval. After the safety code passes through an electronic verification of a service provider, the user device requests the service provider to settle an electronic transaction.

Abstract: A cathode of lithium-ion battery includes a carbon fiber film. The carbon fiber film includes at least one carbon nanotube film including a number of carbon nanotubes joined end to end and extending along a same direction. Each of the number of carbon nanotubes is joined with a number of graphene sheets, and an angle is between each of the number of graphene sheets and the number of carbon nanotubes.

Abstract: A membrane electrode assembly includes a proton exchange membrane and at least one electrode located on the proton exchange membrane, wherein the at least one electrode includes a carbon fiber film. The carbon fiber film includes at least one carbon nanotube film including a number of carbon nanotubes joined end to end and extending along a same direction. Each of the number of carbon nanotubes is joined with a number of graphene sheets, and an angle is between a lengthwise direction of each of the number of graphene sheets and the number of carbon nanotubes.

Abstract: A method for making a carbon nanotube sponge requires a carbon nanotube source being obtained and an organic solvent being added. The organic solvent is ultrasonically agitated to form a flocculent structure. The flocculent structure is washed by water and a carbon nanotube sponge preform obtained by freeze-drying the flocculent structure in a vacuum. Finally, the carbon nanotube sponge itself is obtained by depositing a carbon layer on the carbon nanotube sponge preform. A carbon nanotube sponge obtained by above method is also presented.

Abstract: A method for making a lithium ion battery cathode is provided. A carbon nanotube source including a plurality of carbon nanotubes is made. A cathode active material including a plurality of cathode active material particles and a solvent is provided. The carbon nanotube source and the cathode active material are added into the solvent, and the solvent with the carbon nanotube source and the cathode active material is shaken using ultrasonic waves. The carbon nanotube source and the cathode active material are then separated from the solvent to obtain a lithium ion battery cathode.

Abstract: A method for making a lithium ion battery anode is provided. A carbon nanotube source including a plurality of carbon nanotubes is made. An anode material including a number of anode material particles and a solvent is provided. The carbon nanotube source and the anode material are added into the solvent, and the solvent with the carbon nanotube source and the anode material is shaken using ultrasonic waves. The carbon nanotube source and the anode material are then separated from the solvent to obtain the lithium ion battery anode.

Abstract: The present disclosure relates to a lithium ion battery cathode. The lithium ion battery cathode includes a plurality of cathode active material particles and a conductive carrier. The conductive carrier includes a plurality of carbon nanotubes. The plurality of carbon nanotubes are entangled with each other to form a net structure. The present disclosure also relates to a lithium ion battery.

Abstract: The present disclosure relates to a carbon nanotube sponge comprising: a plurality of carbon nanotubes combined by van der Waals force to form a free-standing structure, wherein a plurality of micropores are defined by adjacent carbon nanotubes; and a plurality of carboxyl groups and hydroxyl groups located on surfaces of the plurality of carbon nanotubes; wherein a weight percentage of the carboxyl groups in the carbon nanotube sponge ranges from about 10% to about 20%, and a weight percentage of the hydroxyl groups in the carbon nanotube sponge ranges from about 5% to about 15%.

Abstract: The present disclosure relates to a method for making a carbon nanotube sponge. A carbon nanotube film structure comprising a plurality of carbon nanotubes and an oxidizing solution formed by an oxidizing agent and hydrogen peroxide is provided. The carbon nanotube film structure is soaked in the oxidizing solution to form a preform. Finally, the carbon nanotube sponge is obtained by freeze-drying the preform under vacuum condition. The present disclosure also relates to a carbon nanotube sponge obtained by above method.

Abstract: A lithium ion battery includes at least one cathode electrode, at least one anode electrode, and an electrolyte. The cathode electrode includes at least one first carbon nanotube paper and at least one cathode electrode plate. The cathode electrode plate locates on a surface of the at least one first carbon nanotube paper, and includes a plurality of stacked first carbon nanotube films. A cathode active material is dispersed in the plurality of first carbon nanotube films. An anode electrode includes at least one first second carbon nanotube paper and at least one first anode electrode plate. The anode electrode plate is located on a surface of the at least one first second carbon nanotube paper, and includes a plurality of stacked second carbon nanotube films. An anode active material is dispersed in the plurality of second carbon nanotube films.

Abstract: The present disclosure relates to a method for making a carbon nanotube sponge. A carbon nanotube film structure comprising a plurality of carbon nanotubes and an oxidizing solution formed by an oxidizing agent and hydrogen peroxide is provided. The carbon nanotube film structure is soaked in the oxidizing solution to form a preform. Finally, the carbon nanotube sponge is obtained by freeze-drying the preform under vacuum condition. The present disclosure also relates to a carbon nanotube sponge obtained by above method.

Abstract: A method for making a thin film lithium ion battery is provided. A cathode material layer and an anode material layer are provided. A first carbon nanotube layer is formed on a surface of the cathode material layer to obtain a cathode electrode. A second carbon nanotube layer is formed on a surface of the anode material layer to obtain an anode electrode. A solid electrolyte layer is applied between the cathode electrode and the anode electrode to form a battery cell. At least one battery cell is then encapsulated in an external encapsulating shell.

Abstract: A method for making lithium ion battery is provided. A cathode material layer and an anode material layer are provided. A first carbon nanotube layer is formed on a surface of the cathode material layer to obtain a cathode electrode. A second carbon nanotube layer is formed on a surface of the anode material layer to obtain an anode electrode. A separator is applied between the cathode electrode and the anode electrode to form a battery cell. At least one battery cell is then encapsulated in an external encapsulating shell, and an electrolyte solution is injected into the external encapsulating shell.

Abstract: A thin film lithium ion battery includes a cathode electrode, an anode electrode, and a solid electrolyte layer. The solid electrolyte layer is sandwiched between the cathode electrode and the anode electrode. At least one of the cathode electrode and the anode electrode includes a current collector. The current collector is a carbon nanotube layer consisting of a plurality of carbon nanotubes.

Abstract: A method for making a lithium ion battery cathode is provided. A carbon nanotube source including a plurality of carbon nanotubes is made. A cathode active material including a plurality of cathode active material particles and a solvent is provided. The carbon nanotube source and the cathode active material are added into the solvent, and the solvent with the carbon nanotube source and the cathode active material is shaken using ultrasonic waves. The carbon nanotube source and the cathode active material are then separated from the solvent to obtain a lithium ion battery cathode.