Surfactant-Assisted Synthesis of High Energy {010}
Facets Beneficial to Li-Ion Transport Kinetics with Layered LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub>
High
energy {010} facets are favorable for Li<sup>+</sup> transport
in a layered Ni-rich LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> cathode through two-dimensional channels that are perpendicular
to the <i>c</i> axis. However, those planes can hardly be
maintained during the synthesis of layered cathodes. Therefore, we
provide a strategy to use appropriate surface active agents which
can alter the surface free energy by reducing surface tension directly.
Here, a novel self-assembled 3D flower-like hierarchical LiNi<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>O<sub>2</sub> is formed
with the help of sodium dodecyl sulfate (SDS), and those high energy
facets are preserved. Due to the unique surface architectures which
would lead to the fast ion transport kinetics as current expands to
100 times (from 0.1 to 10 C), the capacity decay only about 23.4%.
Furthermore, full cells assembled against Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> are constructed with a capacity retention of 80.61%
at 1 C charge/discharge. This study could show a promising material
model for the preferred orientation active planes and higher Li<sup>+</sup> transport kinetic
