Pore structure-controlled pyropolymers as active positive electrode materials for lithium ion batteries
발표자
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초록
내용
In this study, waste pinecone-derived hierarchically porous pyropolymers (WP-HPPs) were fabricated from natural polymer precursors through simple heating process, and their specific surface areas and pore structures were tuned through a chemical activation process. The unique materials properties of WP-HPPs possessing high effective surface areas and hierarchically open nanopores led to high specific capacities of ~412mAh g−1 and considerable rate/cycling performances as a cathode for lithium ion batteries. In addition, when the WP-HPPs based cathode was assembled with a pseudocapacitive pyropolymer counterpart, the pseudocapacitive electrode pair exhibited high specific energy of ~340 Wh kg-1 and a high specific power of ~11,000W kg-1 with long cycling stability over 2000 galvanostatic charge/discharge cycles. These results provide us an insight that natural polymers can be a useful electrode material through exquisite pyrolysis and activation process.