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Caption : figure s1. gcd curves of cf0.56 electrode in the electrolyte solutions of zni2-wise and zncl2-wise under 0.75 a g-1.

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Caption : figure s2. in-situ raman spectra of ng electrode in 3 m zni2 + 27 m zncl2 electrolyte.

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Caption : figure s3. in-situ raman spectra of ng electrode in zni2-wise.

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Caption : figure s4. in-situ raman spectra of cf0.56 electrode in zni2-wise.

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Caption : figure s5. in-situ raman spectra of cf0.56 electrode in zncl2-wise.

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Caption : figure s6. (a) cv-qcm curves of ng electrode during the battery operation. (b) mass-charge relationships of ng electrode during the initial anion intercalation and the final anion de-intercalation processes. 

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Caption : figure s7. cv curves of ng and cf0.56 electrodes under 0.5 mv s-1.

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Caption : figure s8. xrd patterns of (a) ng and (b) cf0.56 electrodes at the ocv, fully charged and fully discharged states.

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Caption : figure s9. eis results of (a) ng and (b) cf0.56 electrodes in the electrolyte solutions of 3 m zni2 + 27 m zncl2 during the charge process.

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Caption : figure s10. the warburg impedances of ng and cf0.56 electrodes at (a, e) ocv, (b, f) 1.3 v, (c, g) 1.8 v and (d, h) 2 v (vs. zn/zn2+). 

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Caption : figure s11. xrd patterns of (a) ng and (b) cf0.56 electrodes before and after 150 cycles.

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Caption : figure s12. sem images of (a, b) ng and (c, d) cf0.56 electrodes before and after 150 cycles.

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Caption : figure s13. gcd curves (a, b) ng and (c, d) cf0.56 electrodes at 0℃ using the wise of 3 m zni2 + 27 m zncl2. 

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Caption : figure s14. gcd curves (a, b) ng and (c, d) cf0.56 electrodes at 50℃ using the wise of 3 m zni2 + 27 m zncl2.