Liquid sodium battery
OwnerTadahiro Ohmi, Tetsuya Goto +1inventors
InventorsTadahiro Ohmi, Tetsuya Goto, Masafumi Kitano
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Abstract
A liquid sodium battery in which two electrode members sandwiching a partition wall formed of a Na-ion conducting solid substance are constructed by a metal having a work function whose absolute value is smaller than that of a work function of sodium and a metal having a work function whose absolute value is greater than that of the work function of sodium.
Claims16
A liquid sodium battery comprising a first electrode, liquid sodium arranged so as to be brought into contact with the first electrode, a partition wall arranged so as to be brought into contact with the liquid sodium and formed of a Na-ion conducting solid substance, and a second electrode arranged on a side opposite to the first electrode with respect to the partition wall through the liquid sodium, wherein:
- the first electrode has a portion brought into contact with the liquid sodium, at least a part of the portion being formed of a first conductive member having a work function whose absolute value is smaller than 2.8 eV, and
- the second electrode has a portion brought into contact with the liquid sodium, at least a part of the portion being formed of a second conductive member having a work function whose absolute value is greater than 2.8 eV.
A liquid sodium battery including a container for containing liquid sodium, wherein:
- a first portion of an inner wall of the container is formed of a first conductive member having a work function whose absolute value is smaller than 2.8 eV;
- and
- a second portion of the inner wall of the container is formed of a second conductive member having a work function whose absolute value is greater than 2.8 eV;
- the liquid sodium battery further comprising:
- a partition wall formed of a Na-ion conducting solid substance and located between the first portion and the second portion in a space inside the container;
- a first space defined between the partition wall and the first portion and filled with the liquid sodium;
- a second space defined between the partition wall and the second portion and filled with the liquid sodium;
- a third space filled with a pressurized inactive gas so as to be brought into contact with the liquid sodium communicating with the liquid sodium filling the second space;
- a liquid sodium flow path arranged so as to return the liquid sodium from the first space to the second space and constructed to prevent electrical short-circuiting between the liquid sodium filling the first space and the liquid sodium filling the second space;
- and
- a first output terminal arranged so as to be electrically connected to the first member and a second output terminal arranged so as to be electrically connected to the second member.
A liquid sodium battery comprising a partition wall formed of a Na-ion conducting solid substance, a first member which is formed of a metal having a work function whose absolute value is smaller than that of a work function of sodium and which is arranged on the side of one surface of the partition wall with a space kept therefrom, and a second member which is formed of a metal having a work function whose absolute value is greater than that of the work function of sodium and which is arranged on the side of the other surface of the partition wall with a space kept therefrom.
A liquid sodium battery using liquid sodium, wherein electrodes are constructed by two metals selected in relation to a work function of sodium and having work functions different from each other, thereby generating an electric power with sodium only.
Dependencies are inferred from the claim text.