V2O5 is a promising cathode material for lithium‐ion batteries owing to its extremely high theoretical capacity (440 mA h g−1 when storing 3 Li+ ions and 294 mA h g−1 when storing 2 Li+). However, drawbacks such as a strong inclination to aggregate and the low conductivity inherent to nanostructured V2O5 drastically deteriorate its cycle and rate performances. Hence, hybridizing it with a conductive matrix (e.g. graphene) for improved electrochemical performance is an interesting concept. It is well established that heteroatom functionalization (e.g. N doping) can tailor the chemical properties of graphene by influencing the neighboring carbon atoms to enhance conductivity and electrochemical activity. Herein, a high‐rate cathode material is fabricated by self‐assembly of V2O5 nanowires on N‐doped graphene nanosheets, followed by heat treatment to optimize the electrochemical performance. The synergistic effects of the resulting V2O5/N‐doped graphene nanohybrids are demonstrated by their excellent rate capability: they deliver very high capacities of 273, 242, 206, 181, and 161 mA h g−1 at current densities of 100, 200, 500, 1000, and 2000 mA g−1.
The front cover artwork is provided by Xiao‐Tian Gao, Xiao‐Dong Zhu, and co‐workers, Harbin Institute of Technology (Harbin, P. R. China). The image shows that the nanohybrids synthesized by assembling V2O5 nanowires on N‐doped graphene nanosheets hold great promise as a cathode material for lithium‐ion batteries. Read the full text of the Communication at 10.1002/celc.201600305.
The Front Cover picture highlights the strategy of a cathode material obtained by self‐assembly of V2O5 nanowires on N‐doped graphene nanosheets. After subsequent heat treatment, the nanohybrids exhibit excellent rate performance as the result of synergistic effects between V2O5 and N‐doped graphene. More information can be found in the Communication by X.‐D. Zhu, K.‐N. Sun, Y.‐T. Liu and co‐workers on page 1730 in Issue 11, 2016 (DOI: 10.1002/celc.201600305).
AMOLED mirror display, with a mirror integrated on the AMOLED panel, was fabricated for the first time. The metal mirror structure, aluminum layer as an example, was developed on the top of encapsulation layer using lithography technology. High quality of mirror effect was represented on a 5.5 AMOLED panel without degradation of display characteristics.
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