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Li 2.0 Ni 0.67 N: a promising negative electrode material for Li-ion batteries with a soft structural response

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Academic year: 2021

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Figure  1.  XRD  pattern  and  Rietveld  refinement  of  the  Li 2 Ni 0.67 N pristine powder (χ²=1.15, Rp=8.9%, Rwp=11.7%)
Figure  2.  (a)  typical  galvanostatic  cycles  at  various  rates  (C/2, C/5, C/10 and C/20) and (b) evolution of the specific  ca-pacity  (reduction  ×;  oxidation  •)  versus  number  of  cycles  at  various rates
Figure  4.  In-plane  representation  of  the  Li 3 N-type  and  Li 5 [(Li 1-x Ni x )N] 3 -type  structures
Figure 5. Left panel represents the second full reduction/oxidation cycle. hkl* Indexations are related to the Li 3 N-type structure  while hkl indexations belonging to the ܲ6ത2݉ supercell
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