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Table 2 Percentages of Si and O of different thermal oxidized Si sludge samples with different oxidation times. All data are before normalization

From: Transformation of sludge Si to nano-Si/SiO_x structure by oxygen inward diffusion as precursor for high performance anodes in lithium ion batteries

Oxidation time (h)	5	7.5	10
Si weight percent (%)	71.05	65.48	60.12
O weight percent (%)	28.42	33.96	39.28
Si:O (mole ratio)	1:0.7	1:0.91	1:1.14

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