A Cost- and Energy Density-Competitive Lithium-Sulfur Battery

A Cost- and Energy Density-Competitive Lithium-Sulfur Battery
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具有成本和能量密度竞争力的锂硫电池

DOI:
10.1016/j.ensm.2021.06.037
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发表时间:
2021-10
影响因子:
20.4
通讯作者:
Xiao Zhubing
Xiao Zhubing
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhong Mei'e;Guan Jindiao;Sun Jingchun;Shu Xiaoqing;Ding Hao;Chen Liying;Zhou Nan;Xiao Zhubing

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以低成本获得共同的高能量密度对于锂硫(Li-S)电池与市售的Li离子电池(LIB)竞争是极具挑战性的。在这里,我们报道了一类生物衍生的致密自支撑阴极,具有0.4的超低孔隙率,通过在热干燥期间的自致密化效应而无需机械压缩,以实现具有高重量/体积能量密度的低成本Li-S电池。受益于生物炭的巨大优势,在高质量负载条件下实现了422 Wh kg−1/446 WhL− 1的联合高重量/体积能量密度(6.5 mg cm−2)和极贫电解质(2.5 μL mg−1),通过材料-系统分析,基于亚Ah水平袋状电池的相应成本估计为对于最初的20个循环低至$60/kWh-$90/kWh,这明显低于典型的商业LIB($100/kWh)。目前的研究为开发商业上可行的Li-S电池提供了有意义的机会,这些电池在特定的能量/成本基础上与当前最先进的LIB竞争。
Attaining jointly high energy density at low cost is extremely challenging for lithium-sulfur (Li-S) batteries to compete with commercially available Li ion batteries (LIB). Here we report a class of bio-derived dense self-supporting cathode with ultralow porosity of 0.4 via self-densification effect during thermal drying without mechanical compression to realize a low-cost Li-S cell with high gravimetric/volumetric energy densities. Benefiting from the great preponderances of biochar, jointly high gravimetric/volumetric energy densities of 422 Wh kg−1/446 WhL−1are achieved under conditions of high mass loading (6.5 mg cm−2) and extremely lean electrolyte (2.5 μL mg−1), the corresponding costs based on sub-Ah level pouch cell are estimated to be as low as $60/kWh-$90/kWh for the initial 20 cycles via a materials-to-system analysis, which is visibly less than that in the typical commercial LIB ($100/kWh). The current study presents meaningful opportunity to develop commercially viable Li-S batteries that are competitive on a specific energy/cost basis with current state-of-the-art LIB.
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