Excellent Rate Capability of Mgo-Templated Mesoporous Carbon As an Na-Ion Energy Storage Material

MgO-templated mesoporous carbon was investigated as an anode material for Na-ion storage. The mesoporous carbons exhibited a discharge capacity of 180 mAh g(-1) at a current density of 0.1 A g(-1) in a potential range of 2.00-0.01 V vs. Na+/Na. This capacity was comparable to that of commercial hard carbon materials. They also showed an outstanding rate capability: 70 mAh g(-1) at 4 A g(-1), which was 10-fold greater than the corresponding capability of commercial hard carbons. These results indicate that MgO-templated mesoporous carbon is a potential new anode material for high-power-density Na-ion batteries and capacitors. (C) 2014 The Electrochemical Society. All rights reserved.