RETRACTED: Theoretical Limits of Energy Density in Silicon-Carbon Composite Anode Based Lithium Ion Batteries (Retracted Article)

被引:105
作者
Dash, Ranjan [1 ]
Pannala, Sreekanth [2 ]
机构
[1] SABIC, 475 Creamery Way, Exton, PA 19341 USA
[2] SABIC, 14100 Southwest Freeway, Sugar Land, TX 77478 USA
关键词
IN-SITU MEASUREMENTS; ELECTRODES; CELLS;
D O I
10.1038/srep27449
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Silicon (Si) is under consideration as a potential next-generation anode material for the lithium ion battery (LIB). Experimental reports of up to 40% increase in energy density of Si anode based LIBs (Si-LIBs) have been reported in literature. However, this increase in energy density is achieved when the Si-LIB is allowed to swell (volumetrically expand) more than graphite based LIB (graphite-LIB) and beyond practical limits. The volume expansion of LIB electrodes should be negligible for applications such as automotive or mobile devices. We determine the theoretical bounds of Si composition in a Si-carbon composite (SCC) based anode to maximize the volumetric energy density of a LIB by constraining the external dimensions of the anode during charging. The porosity of the SCC anode is adjusted to accommodate the volume expansion during lithiation. The calculated threshold value of Si was then used to determine the possible volumetric energy densities of LIBs with SCC anode (SCC-LIBs) and the potential improvement over graphite-LIBs. The level of improvement in volumetric and gravimetric energy density of SCC-LIBs with constrained volume is predicted to be less than 10% to ensure the battery has similar power characteristics of graphite-LIBs.
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页数:7
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