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A facile room-temperature solid-state route is developed to produce Co(OH) 2 /bamboo charcoal composite for the first time. Electrochemical results show that the resulting composite with the bamboo charcoal content of 20wt% can deliver a high specific capacitance of 439Fg −1 at 0.2Ag −1 , which is much larger than that of the bare Co(OH) 2 (294Fg −1 ) and bamboo...
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