Mesoporous Nickel-Based Zeolite Capsule Complex with Fe₃O₄ as Electrode for Advanced Supercapacitor

Figure 2

The SEM images at different magnification of the pure Fe₃O₄ (a–b), the zeolite template (c–e), the complex materials (f–h), and the nickel-based complex electrode (i–j), respectively. The EDS spectra of the zeolite template (k) and the complex materials (l).

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