Nonequilibrium structural dynamics of nanoparticles in LiNi(1/2)Mn(3/2)O4 cathode under operando conditions.

@article{Singer2014NonequilibriumSD,
  title={Nonequilibrium structural dynamics of nanoparticles in LiNi(1/2)Mn(3/2)O4 cathode under operando conditions.},
  author={Andrej Singer and Andrew Ulvestad and Hyung-Man Cho and J Kim and Joerg Maser and Ross J. Harder and Ying Shirley Meng and Oleg G Shpyrko},
  journal={Nano letters},
  year={2014},
  volume={14 9},
  pages={
          5295-300
        }
}
We study nonequilibrium structural dynamics in LiNi1/2Mn3/2O4 spinel cathode material during fast charge/discharge under operando conditions using coherent X-rays. Our in situ measurements reveal a hysteretic behavior of the structure upon cycling and we directly observe the interplay between different transformation mechanisms: solid solution and two-phase reactions at the single nanoparticle level. For high lithium concentrations solid solution is observed upon both charge and discharge. For… CONTINUE READING
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