期刊
JOULE
卷 1, 期 1, 页码 122-132出版社
CELL PRESS
DOI: 10.1016/j.joule.2017.08.009
关键词
-
资金
- US Department of Energy ARPA-E Grant [DEAR0000389]
- Oak Ridge Associated Universities (ORAU) Postdoctoral Fellowships [W911NF-16-2-0107, W911NF-16-2-0187]
Although recent efforts have expanded the stability window of aqueous electrolytes from 1.23 V to > 3 V, intrinsically safe aqueous batteries still deliver lower energy densities (200 Wh/kg) compared with state-of-the-art Li-ion batteries (similar to 400 Wh/ kg). The essential origin for this gap comes from their cathodic stability limit, excluding the use of themost ideal anodematerials (graphite, Limetal). Here, we resolved this ''cathodic challenge'' by adopting an ''inhomogeneous additive'' approach, in which a fluorinated additive immiscible with aqueous electrolyte can be applied on anode surfaces as an interphase precursor coating. The strong hydrophobicity of the precursor minimizes the competitive water reduction during interphase formation, while its own reductive decomposition forms a unique composite interphase consisting of both organic and inorganic fluorides. Such effective protection allows these high-capacity/low-potential anode materials to couple with different cathode materials, leading to 4.0 V aqueous Li-ion batteries with high efficiency and reversibility.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据