CORE-SHELL HIGH CAPACITY NANOWIRES FOR BATTERY ELECTRODES
First Claim
1. A nanostructure for use in a battery electrode, the nanostructure comprising:
- a conductive core for providing electronic conductivity along the length of the nanostructure;
an inner shell including a high capacity electrochemically active material having a stable electrochemical capacity of at least about 1000 mAh/g, said inner shell in electronic communication with the conductive core; and
an outer shell partially coating the inner shell and substantially preventing formation of a Solid Electrolyte Interphase (SEI) layer directly on the inner shell.
0 Assignments
0 Petitions
Accused Products
Abstract
Provided are nanostructures containing electrochemically active materials, battery electrodes containing these nanostructures for use in electrochemical batteries, such as lithium ion batteries, and methods of forming the nanostructures and battery electrodes. The nanostructures include conductive cores, inner shells containing active materials, and outer shells partially coating the inner shells. The high capacity active materials having a stable capacity of at least about 1000 mAh/g can be used. Some examples include silicon, tin, and/or germanium. The outer shells may be configured to substantially prevent formation of Solid Electrolyte lnterphase (SEI) layers directly on the inner shells. The conductive cores and/or outer shells may include carbon containing materials. The nanostructures are used to form battery electrodes, in which the nanostructures that are in electronic communication with conductive substrates of the electrodes.
-
Citations
30 Claims
-
1. A nanostructure for use in a battery electrode, the nanostructure comprising:
-
a conductive core for providing electronic conductivity along the length of the nanostructure; an inner shell including a high capacity electrochemically active material having a stable electrochemical capacity of at least about 1000 mAh/g, said inner shell in electronic communication with the conductive core; and an outer shell partially coating the inner shell and substantially preventing formation of a Solid Electrolyte Interphase (SEI) layer directly on the inner shell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A battery electrode for use in an electrochemical battery, the battery electrode comprising:
-
a conductive substrate; and a nanostructure comprising; a conductive core for providing electronic conductivity along the length of the nanostructure; an inner shell including a high capacity electrochemically active material having a capacity of at least about 1000 mAh/g and in electronic communication with the conductive core; and an outer shell partially coating the inner shell and substantially preventing formation of a Solid Electrolyte Interphase (SEI) directly on the inner shell, wherein at least the conductive core and the inner shell are in electronic communication with the conductive substrate. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A method of forming a nanostructure for use in a battery electrode, the method comprising:
-
forming a conductive core for providing electronic conductivity along the length of the nanostructure; forming an inner shell including a high capacity electrochemically active material having a stable electrochemical capacity of at least about 1000 mAh/g and in electronic communication with the conductive core; and forming an outer shell partially coating the inner shell and substantially preventing formation of a Solid Electrolyte Interphase (SEI) directly on the inner shell. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
-
Specification