Xiao-Jing FENG, Gong-Kai WANG, Xiao-Ran WANG, Jun HE, Xin WANG, Hui-Fen PENG. Electrochemical Property of Cr 3+ Doped LiSn2(PO4)3 Anode Material [J]. Journal of Inorganic Materials, 2019, 34(4): 358
- Journal of Inorganic Materials
- Vol. 34, Issue 4, 358 (2019)
1. XRD patterns (a) and the second charge-discharge curves at 100 mA/g (b) of the products heat-treated at various temperatures with Cr3+ content of 0.4
2. XRD patterns of the xerogels with Li1+x Crx Sn2-x (PO4)3 (x= 0-0.5) heat-treated at different temperatures(b) Enlarged patterns of (a)
3. Second charge-discharge curves at 100 mA/g (a) and the discharge capacities at different current densities (b) of the batteries assembled with the samples containing different Cr3+ contents, and the charge-discharge curves at different rates for the samples of Li1Sn2(PO4)3 (c) and Li1.3Cr0.3Sn1.7(PO4)3 (d)
4. Cyclic charge-discharge curves at 100 mA/g of the batteries assembled with the sample Li1.3Cr0.3Sn1.7(PO4)3 (a), variation in discharging capacity for the samples of x= 0 and x= 0.3 (b) and rate performance between 100 mA/g and 800 mA/g for the batteries assembled with the Li1.3Cr0.3Sn1.7(PO4)3 sample (c)
5. AC impedance spectra (a) and relationship between Z ° and ω -1/2of the samples with different Cr3+ contents (b) with inserts showing local magnification of AC impedance spectra and their equivalent circuit
S1. SEM images and EDX patterns of the Li1+x Crx Sn2-x (PO4)3 samples
S2. XPS spectra for the Li1+x Crx Sn2-x (PO4)3 samples with x of 0.2, 0.3 and 0.4
S3. XRD patterns of the Li1.3Cr0.3Sn1.7(PO4)3 electrode after charging and discharging at different voltages (a), and enlargement (b) of the box region in (a)
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Table 1. Charge transfer resistance (R ct), Warburg coefficients (σ ) in Fig. 5 and Li+ diffusion coefficients (D ) of the samples
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