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SnS_(2)/SnS/NC异质结构微米花的构筑及储钾性能探究
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作者 曹康哲 何亚楠 +2 位作者 王思甜 付金金 刘会俏 《信阳师范学院学报(自然科学版)》 CAS 2024年第2期141-146,共6页
采用水热法制备SnS_(2)微米花(MFs),以聚多巴胺衍生的氮掺杂碳(NC)作为还原剂和缓冲基质,合成了SnS_(2)/SnS/NC异质结构微米花(SSNC MFs)作为钾离子电池负极材料。SnS_(2)和SnS形成的异质界面加快了电荷的转移,进而改善了电化学动力学... 采用水热法制备SnS_(2)微米花(MFs),以聚多巴胺衍生的氮掺杂碳(NC)作为还原剂和缓冲基质,合成了SnS_(2)/SnS/NC异质结构微米花(SSNC MFs)作为钾离子电池负极材料。SnS_(2)和SnS形成的异质界面加快了电荷的转移,进而改善了电化学动力学。同时,NC增强了复合材料的导电性和结构稳定性。因而,SSNC MFs电极在0.1 A/g下,循环50周的可逆比容量为492.4 mAh/g,2.0 A/g下仍保持在199.6 mAh/g,远大于相同测试条件下的SnS_(2) MFs电极(分别为132.1和28.4 mAh/g),表现出显著提升的可逆比容量、循环稳定性和倍率性能。 展开更多
关键词 钾离子电池 负极材料 锡基硫化物 异质结构 储钾性能
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Coordination engineering of Cu-Zn-Sn-S aqueous precursor for efficient kesterite solar cells 被引量:6
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作者 Linbao Guo Jiangjian Shi +9 位作者 Qing Yu Biwen Duan Xiao Xu Jiazheng Zhou Jionghua Wu Yusheng Li Dongmei Li Huijue Wu Yanhong Luo Qingbo Meng 《Science Bulletin》 SCIE EI CAS CSCD 2020年第9期738-746,M0004,共10页
Aqueous precursors provide an alluring approach for low-cost and environmentally friendly production of earth-abundant Cu2ZnSn(S,Se)4(CZTSSe)solar cells.The key is to find an appropriate molecular agent to prepare a s... Aqueous precursors provide an alluring approach for low-cost and environmentally friendly production of earth-abundant Cu2ZnSn(S,Se)4(CZTSSe)solar cells.The key is to find an appropriate molecular agent to prepare a stable solution and optimize the coordination structure to facilitate the subsequent crystallization process.Herein,we introduce thioglycolic acid(TGA),which possesses strong coordination(SH)and hydrophilic(COOH)groups,as the agent and use deprotonation to regulate the coordination competition within the aqueous solution.Ultimately,metal cations are adequately coordinated with thiolate anions,and carboxylate anions are released to become hydrated to form an ultrastable aqueous solution.These factors have contributed to achieving CZTSSe solar cells with an efficiency as high as 12.3%(a certified efficiency of 12.0%)and providing an extremely wide time window for precursor storage and usage.This work represents significant progress in the non-toxic solution fabrication of CZTSSe solar cells and holds great potential for the development of CZTSSe and other metal sulfide solar cells. 展开更多
关键词 Kesterite solar cell Aqueous solution Coordination chemistry CZTSSe
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