$Li$ occupies a higher position in the electrochemical series of metals as compared to $Cu$ since:
- Athe standard reduction potential of $Li^{+} / Li$ is lower than that of $Cu^{2+} / Cu$
- Bthe standard reduction potential of $Cu^{2+} / Cu$ is lower than that of $Li^{+} / Li$
- Cthe standard oxidation potential of $Li / Li^{+}$ is lower than that of $Cu / Cu^{2+}$
- D$Li$ is smaller in size as compared to $Cu$
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