Novel multinary nanocomposite of GO/AlCrO₃/SiO₂/Mn₃O₄/SnO₂: synthesis and electrochemical performance for energy storage system

Figures & data

Figure 1. Graphene mechanical and electrical properties.

Figure 2. XRD pattern of (a) GO, (b) AlCrO3 and (c) GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite.

Table 1. Lattice parameters, particle, crystalline size and strain values of compound.

Sample	a (Å)	c (Å)	c/a	Crystal size (nm)	Strain from WH plot	Particle size (nm)
AlCrO3	9.089	9.089	1.000	16.88	0.800	07
GO	2.461	6.708	0.366	21.20	0.042	20
GO@AlCrO3@SiO2@Mn3O4@SnO2	8.320	8.320	1.000	11.81	0.0167	16

Figure 3. WH plot curves of (a) AlCrO₃ and (b) GO@AlCrO₃@SiO₂@Mn₃O₄ nanocomposite.

Table 2. Miller indices and peak lists of AlCrO₃ and GO/AlCrO₃/SiO₂/Mn₃O₄/SnO₂ nanocomposite.

2$\mathit{\theta }$AlCrO3	$\mathit{\theta }$	hkl	2$\mathit{\theta GO}$@@AlCrO3@SiO2@Mn3O4@SnO2	$\mathit{\theta }$	hkl
20.738	10.369	200	26.085	13.0425	111
24.943	12.4715	211	27.655	13.8275	220
34.145	17.0725	220	30.046	15.023	311
36.837	18.4185	321	35.441	17.7205	222
42.145	21.0725	330	37.951	18.9755	400
51.108	25.554	510	44.347	22.1735	331
55.708	27.854	521	53.809	26.9045	422
59.238	29.619	530	56.080	28.04	511
66.149	33.0745	600	62.631	31.3155	440
74.541	37.2705	611	65.759	32.8795	531
78.225	39.1125	611	71.790	35.895	622
			74.121	37.0605	533

Figure 4. SEM images of (a) GO (b) GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ (c) AlCrO₃.

Figure 5. Grains diameter variation and Histogram distribution of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite.

Figure 6. FTIR spectra of (a) GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ (b) GO (c) Mn₃O₄ and (d) AlCrO₃.

Figure 7. EDs spot and spectra of AlCrO3.

Figure 8. Energy dispersive spot and spectra of GO@AlCrO3@SiO2@Mn3O4@SnO2 nanocomposite.

Figure 9. Raman spectra of (a) GO and (b) GO@AlCrO3@SiO2@Mn3O4@SnO2 nanocomposite.

Figure 10. Band Gap of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite.

Figure 11. Zeta potential of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite.

Figure 12. Cyclic voltammetry at various scan rates GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite.

Figure 13. The specific capacitance of nanocomposite at various scan rates.

Table 3. Measurements of specific capacitance of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ at various scan rates.

Scan rate (mVs^−1)	Specific capacitance (Fg^−1)
10	2495
20	2342
30	2042
50	1933
100	1814

Figure 14. (a) GCD curves and Ragone plot of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite in IM KOH electrolyte (b) Cycling performance.

Figure 15. EIS spectra of GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite in IM KOH electrolyte solution.

Table 4. GO@AlCrO₃@SiO₂@Mn₃O₄@SnO₂ nanocomposite electrode material parameters.

Electrolyte	Rct (Ω)	α	kapp × 10^−9 (cms^−1)
1M KOH	64.99	0.92	4.806

Table 5. Comparison of multinary composite with previous literature.

Electrode Material	Capacitance (F/g)	Electrolyte	Reference
Quaternary NiCuCo2S4 thin film	159	5 M KOH	[95]
Cu2FeSnS4/PVP/rGO composite	328	2 M KOH	[96]
CuFeS2 nanoflakes	219	2 M KOH	[97]
GO/LiCr2O4 nanocomposite	321	0.1 M H2SO4	[71]
GO@AlCrO3@SiO2@Mn3O4@SnO2	2495	1M KOH	This Work

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