...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of power sources >Electrochemical characteristics of room temperature Li/FeS_2 batteries with natural pyrite cathode
【24h】

Electrochemical characteristics of room temperature Li/FeS_2 batteries with natural pyrite cathode

机译：天然黄铁矿阴极室温Li / FeS_2电池的电化学特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Electrochemical characteristics of Li/FeS_2 batteries having natural pyrite as cathode and liquid electrolytes have been studied at room temperature. The organic electrolytes used were 1M lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) in tetra(ethylene glycol) dimethyl ether (TEGDME) or a mixture of TEGDME and 1,3-dioxolane (DOX), and 1M LiPF_6 in a mixture of ethylene carbonate (EC) and dimethyl carbonate (DMC). The pyrite powder and FeS_2 cathode were characterized by SEM, EDS, XRD and charge/discharge cycling. The discharge capacities of Li/FeS_2 cells with 1M LiTFSI dissolved in TEGDME were 772 mAh g~(-1) at the 1st cycle and 313 mAh g~(-1) at the 25th cycle at 0.1C, The cycling performance could be improved by using a mixture of TEGDME and DOX as the electrolyte. It was found that TEGDME contributed to high initial discharge capacity, whereas, DOX contributed to better stabilization of the performance. The first discharge capacities of Li/FeS_2 cells showed a decreasing trend with higher current densities (615 and 534 mAh g~(-1), respectively, at 0.5C and 1.0C). Li/FeS_2 cells with the battery grade electrolyte 1M LiPF_6 in EC/DMC had lower initial discharge capacity and cycling capability compared to the TEGDME system. The natural pyrite cathode with 1M LiTFSI dissolved in a mixture of TEGDME and DOX showed reasonably good first discharge capacity and overall cycling performance, suitable for application in room temperature lithium batteries.
机译：在室温下研究了具有天然黄铁矿作为阴极和液体电解质的Li / FeS_2电池的电化学特性。所使用的有机电解质为：在四乙二醇（乙二醇）二甲醚（TEGDME）中的1M双（三氟甲基磺酰基）酰亚胺锂（LiTFSI）或TEGDME和1,3-二氧戊环（DOX）的混合物，以及在碳酸亚乙酯混合物中的1M LiPF_6 （EC）和碳酸二甲酯（DMC）。通过SEM，EDS，XRD和充放电循环对黄铁矿粉和FeS_2阴极进行表征。溶解于TEGDME中的1M LiTFSI的Li / FeS_2电池在0.1C时的第一循环放电容量为772 mAh g〜（-1），在第25循环放电容量为313 mAh g〜（-1），可提高循环性能通过使用TEGDME和DOX的混合物作为电解质。发现TEGDME有助于高初始放电容量，而DOX有助于更好的性能稳定。 Li / FeS_2电池的首次放电容量随着电流密度的增加而下降（在0.5C和1.0C时分别为615和534 mAh g〜（-1））。与TEGDME系统相比，在EC / DMC中具有电池级电解质1M LiPF_6的Li / FeS_2电池具有较低的初始放电容量和循环能力。具有溶解在TEGDME和DOX混合物中的1M LiTFSI的天然黄铁矿阴极显示出相当好的首次放电容量和整体循环性能，适用于室温锂电池。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号