Development of a Sealed Rechargeable Li–SO2 Battery

IF 14.3 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Gayea Hyun, Myeong Hwan Lee, Haodong Liu, Shen Wang, Zeyu Hui, Victoria Petrova, Ping Liu
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Abstract

Rechargeable Li–SO2 batteries offer low-cost, high-energy density benefits and can leverage manufacturing processes for the existing primary version at a commercial scale. However, they have so far only been demonstrated in an “open-system” with continuous gas supply, preventing practical application. Here, the utilization and reversibility of SO2 along with the lithium stability are addressed, all essential for long-life, high-energy batteries. The study discovers that high SO2 utilization is achievable only from SO2 dissolved in electrolytes between the lithium anode and carbon cathode. This results from a unique osmosis phenomenon where SO2 consumption increases salt concentration, driving the influx of organic solvents rather than SO2 from outside the current path. This insight leads to configure a bobbin-cell with all electrolytes between the electrodes, realizing nearly 70% of SO2 utilization, > 12x greater than in conventional coin cells. To improve reaction rate and SO2 reversibility, triphenylamine is employed to the electrolyte, creating an electron-rich environment that alleviates the disproportionation of discharge products. Incorporating this additive into a bobbin-cell with a lithium protective layer yields a cell with a projected energy density exceeding 183.2 Wh kg−1. The work highlights the potential of Li–SO2 batteries as affordable, sustainable energy storage options.

Abstract Image

密封可充电Li-SO2电池的研制。
可充电的Li-SO2电池具有低成本、高能量密度的优势,并且可以在商业规模上利用现有初级版本的制造工艺。然而,到目前为止,它们只在连续供气的“开放式系统”中进行了演示,因此无法实际应用。在这里,SO2的利用率和可逆性以及锂的稳定性都得到了解决,这些都是长寿命、高能量电池所必需的。研究发现,只有溶解在锂阳极和碳阴极之间的电解质中的SO2才能实现高SO2利用率。这是由于一种独特的渗透现象,即二氧化硫的消耗增加了盐浓度,导致有机溶剂的流入,而不是来自当前路径外的二氧化硫。根据这一见解,我们将线轴电池配置为电极之间的所有电解质,实现了近70%的二氧化硫利用率,比传统的硬币电池高12倍。为了提高反应速率和SO2的可逆性,在电解质中加入了三苯胺,创造了一个富电子的环境,减轻了放电产物的歧化。将这种添加剂掺入带有锂保护层的线轴电池中,可以得到投射能量密度超过183.2 Wh kg-1的电池。这项工作强调了锂-二氧化硫电池作为经济实惠、可持续的储能选择的潜力。
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来源期刊
Advanced Science
Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
18.90
自引率
2.60%
发文量
1602
审稿时长
1.9 months
期刊介绍: Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.
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