Jiarui Li , Xuefeng Chen , Songying Shao , Licheng Tang , Jiajun Zhu , Wulin Yang , Lingping Zhou , Zaifang Yuan , Licai Fu
{"title":"利用固态合成技术制备高容量 Co0.8Fe0.2S2 热电池正极","authors":"Jiarui Li , Xuefeng Chen , Songying Shao , Licheng Tang , Jiajun Zhu , Wulin Yang , Lingping Zhou , Zaifang Yuan , Licai Fu","doi":"10.1016/j.electacta.2024.144623","DOIUrl":null,"url":null,"abstract":"<div><p>CoS<sub>2</sub> with high thermal stability is commonly used as cathode material for thermal batteries, however, its practical performance is limited by insufficient electrochemical reactions during discharge. Enlighted by metal-doping that can regulate the electronic environment and lattice structure, high-energy Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> is successfully prepared by solid-state methods. Remarkably, with a current density of 0.3 A·cm<sup>−2</sup> at a cutoff voltage of 1.42 V under 550 °C, Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> exhibits excellent performance with a prolonged discharge platform and decreased resistance (0.23 Ω), generating an ultrahigh specific capacity of 652 mAh·g<sup>−1</sup><sub>,</sub> which is 31 % higher than that of pure CoS<sub>2</sub>. Our research indicates that Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> is suitable for high-energy and high-temperature thermal batteries. The feasibility of solid-state synthesis of pure-phase bimetallic disulfides has been verified as well, paving the way for industrial application of Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub>.</p></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High capacity Co0.8Fe0.2S2 thermal battery cathode prepared by a solid-state synthesis technique\",\"authors\":\"Jiarui Li , Xuefeng Chen , Songying Shao , Licheng Tang , Jiajun Zhu , Wulin Yang , Lingping Zhou , Zaifang Yuan , Licai Fu\",\"doi\":\"10.1016/j.electacta.2024.144623\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>CoS<sub>2</sub> with high thermal stability is commonly used as cathode material for thermal batteries, however, its practical performance is limited by insufficient electrochemical reactions during discharge. Enlighted by metal-doping that can regulate the electronic environment and lattice structure, high-energy Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> is successfully prepared by solid-state methods. Remarkably, with a current density of 0.3 A·cm<sup>−2</sup> at a cutoff voltage of 1.42 V under 550 °C, Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> exhibits excellent performance with a prolonged discharge platform and decreased resistance (0.23 Ω), generating an ultrahigh specific capacity of 652 mAh·g<sup>−1</sup><sub>,</sub> which is 31 % higher than that of pure CoS<sub>2</sub>. Our research indicates that Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub> is suitable for high-energy and high-temperature thermal batteries. The feasibility of solid-state synthesis of pure-phase bimetallic disulfides has been verified as well, paving the way for industrial application of Co<sub>0.8</sub>Fe<sub>0.2</sub>S<sub>2</sub>.</p></div>\",\"PeriodicalId\":305,\"journal\":{\"name\":\"Electrochimica Acta\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2024-06-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochimica Acta\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0013468624008636\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013468624008636","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
High capacity Co0.8Fe0.2S2 thermal battery cathode prepared by a solid-state synthesis technique
CoS2 with high thermal stability is commonly used as cathode material for thermal batteries, however, its practical performance is limited by insufficient electrochemical reactions during discharge. Enlighted by metal-doping that can regulate the electronic environment and lattice structure, high-energy Co0.8Fe0.2S2 is successfully prepared by solid-state methods. Remarkably, with a current density of 0.3 A·cm−2 at a cutoff voltage of 1.42 V under 550 °C, Co0.8Fe0.2S2 exhibits excellent performance with a prolonged discharge platform and decreased resistance (0.23 Ω), generating an ultrahigh specific capacity of 652 mAh·g−1, which is 31 % higher than that of pure CoS2. Our research indicates that Co0.8Fe0.2S2 is suitable for high-energy and high-temperature thermal batteries. The feasibility of solid-state synthesis of pure-phase bimetallic disulfides has been verified as well, paving the way for industrial application of Co0.8Fe0.2S2.
期刊介绍：
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.
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