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Promoting Si-graphite composite anodes with SWCNT additives for half and NCM811 full lithium ion batteries and assessment criteria from an industrial perspective
Jingning SHAN, Xiaofang YANG, Chao YAN, Lin CHEN, Fang ZHAO, Yiguang JU
Frontiers in Energy. 2019, 13 (4): 626-635.
https://doi.org/10.1007/s11708-019-0650-y
Single wall carbon nanotube (SWCNT) additives were formulated into µm-Si-graphite composite electrodes and tested in both half cells and full cells with high nickel cathodes. The critical role of small amount of SWCNT addition (0.2 wt%) was found for significantly improving delithiation capacity, first cycle coulombic efficiency (FCE), and capacity retention. Particularly, Si (10 wt%)-graphite electrode exhibits 560 mAh/g delithiation capacity and 92% FCE at 0.2 C during the first charge-discharge cycle, and 91% capacity retention after 50 cycles (0.5 C) in a half cell. Scanning electron microscope (SEM) was used to illustrate the electrode morphology, compositions and promoting function of the SWCNT additives. In addition, full cells assembled with high nickel-NCM811 cathodes and µm-Si-graphite composite anodes were evaluated for the consistence between half and full cell performance, and the consideration for potential commercial application. Finally, criteria to assess Si-containing anodes are proposed and discussed from an industrial perspective.
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钍基熔盐反应堆固体燃料设计的现象识别和排序表练习
刘晓晶, 王琪, 何兆忠, 陈堃, 程旭
Frontiers in Energy. 2019, 13 (4): 707-714.
https://doi.org/10.1007/s11708-019-0616-0
钍基熔融盐反应堆固体燃料(TMSR-SF)设计是一种创新的反应堆概念,它使用高温三结构各向同性(TRISO)燃料和低压液态盐冷却剂。 为了将来获得TMSR-SF的许可申请,有必要充分了解TMSR-SF设计的重要特征和现象,以及在事故发生时的瞬态行为。 在本文中,针对所选事件评估了安全相关现象,重要性和知识库,并基于RELAP / SCDAPSIM Mod 4.0模拟了车站停电期间TMSR-SF的瞬变。 具有显着影响但对它们的历史了解有限的现象是堆芯冷却剂旁路流量,出口气室流量分布以及冷却瞬态过高/过低的中间热交换器(IHX)。 还讨论了车站停电期间的一些热工水力参数。
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