TY - JOUR
AU - Ning Li
AU - Sooyeon Hwang
AU - Meiling Sun
AU - Yanbao Fu
AU - Vincent S Battaglia
AU - Dong Su
AU - Wei Tong
AB - <p><span>Extensive efforts have been devoted to unraveling the true cause of voltage decay in Li, Mn‐rich layered oxides. An initial consensus was reached on structural rearrangement, then leaned toward the newly discovered lattice oxygen activity. It is challenging to differentiate their explicit roles because these events typically coexist during the electrochemical reaction of most Li‐rich layered oxides. Here, the voltage decay behavior is probed in Li</span><span>1.2</span><span>Ni</span><span>0.2</span><span>Ru</span><span>0.6</span><span>O</span><span>2</span><span>, a structurally and electrochemically relevant compound to Li, Mn‐rich layered oxide, but of no oxygen activity. Such intriguing characteristics allow the explicit decoupling of the contribution of transition metal migration and lattice oxygen activity to voltage decay in Li‐rich layered oxides. The results demonstrate that the microstructural evolution, mainly originating from transition metal migration, is a direct cause of voltage decay, and lattice oxygen activity likely accelerates the decay.</span></p>
BT - Advanced Energy Materials
DA - 11/2019
DO - 10.1002/aenm.201902258
IS - 47
LA - eng
N2 - <p><span>Extensive efforts have been devoted to unraveling the true cause of voltage decay in Li, Mn‐rich layered oxides. An initial consensus was reached on structural rearrangement, then leaned toward the newly discovered lattice oxygen activity. It is challenging to differentiate their explicit roles because these events typically coexist during the electrochemical reaction of most Li‐rich layered oxides. Here, the voltage decay behavior is probed in Li</span><span>1.2</span><span>Ni</span><span>0.2</span><span>Ru</span><span>0.6</span><span>O</span><span>2</span><span>, a structurally and electrochemically relevant compound to Li, Mn‐rich layered oxide, but of no oxygen activity. Such intriguing characteristics allow the explicit decoupling of the contribution of transition metal migration and lattice oxygen activity to voltage decay in Li‐rich layered oxides. The results demonstrate that the microstructural evolution, mainly originating from transition metal migration, is a direct cause of voltage decay, and lattice oxygen activity likely accelerates the decay.</span></p>
PY - 2019
EP - 1902258
ST - Adv. Energy Mater.
T2 - Advanced Energy Materials
TI - Unraveling the Voltage Decay Phenomenon in Li‐Rich Layered Oxide Cathode of No Oxygen Activity
VL - 9
SN - 1614-6832
ER -