Electrode containing silicon and copolymer having ionic ally conductive polymer and electrically conductive polymer, and battery cell using same
AssigneeRobert Bosch GmbH
InventorsBernd Schumann, Pallavi Verma
Life of this patent
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Abstract
An electrode for a battery cell, including an active material which contains silicon and which contains a first polymer which is ionically conductive. The active material contains in this case a copolymer, which includes the first polymer and a second polymer, the second polymer being electrically conductive. A battery cell which includes at least one electrode is also described.
Claims17
An electrode for a battery cell, including an active material which contains:
- at least one of silicon and an alloy including silicon,
- a first polymer which is ionically conductive,
- a copolymer which includes the first polymer and a second polymer, the second polymer being electrically conductive, wherein the at least one of the silicon and the alloy including silicon is embedded as grains in the copolymer so as to prevent contact between an electrolyte in the battery cell and the grains of the at least one of the silicon and the alloy including silicon, wherein:
- the at least one of silicon and the alloy including silicon includes a plurality of grains of at least one of silicon and the alloy including silicon,
- the second polymer includes a plurality of blocks, and
- at least one of the plurality of blocks of the second polymer contacts a first and a second of the grains such that the at least one of the blocks serves as an electronically conductive bridge between the first and the second grains.
A battery cell, including at least one electrode, the electrode including an active material which contains silicon and a first polymer which is ionically conductive, wherein the active material contains a copolymer which includes the first polymer and a second polymer, the second polymer being electrically conductive, wherein the silicon is embedded as grains in the copolymer so as to prevent contact between an electrolyte in the battery cell and the grains of the silicon, wherein:
- the silicon includes a plurality of grains of silicon,
- the second polymer includes a plurality of blocks, and
- at least one of the plurality of blocks of the second polymer contacts a first and a second of the grains such that the at least one of the blocks serves as an electronically conductive bridge between the first and the second grains.
A method of using a battery cell, comprising:
- providing a battery cell in one of an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle, the battery cell including at least one electrode, the electrode including an active material which contains silicon and a first polymer which is ionically conductive, wherein the active material contains a copolymer which includes the first polymer and a second polymer, the second polymer being electrically conductive, wherein the silicon is embedded as grains in the copolymer so as to prevent contact between an electrolyte in the battery cell and the grains of the silicon;
- and
- using the battery cell in the electric vehicle, the hybrid electric vehicle, or the plug-in hybrid electric vehicle, wherein:
- the silicon includes a plurality of grains of the silicon,
- the second polymer includes a plurality of blocks, and
- at least one of the plurality of blocks of the second polymer contacts a first and a second of the grains such that the at least one of the blocks serves as an electronically conductive bridge between the first and the second grains.
Dependencies are inferred from the claim text.