| abstract |
The present invention provides a kind of sodium rechargeable battery negative material and its manufacture method for keeping playing excellent cycle characteristics while high discharge capacity, and sodium rechargeable battery negative pole and sodium rechargeable battery.The sodium rechargeable battery negative material of the present invention is made up of the sulfide containing sulfur and antimony or sulfide complex, and also includes the composition of following (i) as needed.I () at least selects more than one element from by Sn in the group of As, Bi, Ge, Pb, C composition, when containing (i), the ratio of above-mentioned each composition is sulfur：10～70 moles of %, antimony：10～70 moles of %, (i)：3～60 moles of %. |