Carbon Nanosheet Frameworks Derived from Peat Moss as High Performance Sodium Ion Battery Anodes
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- 12 November 2013
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 7 (12), 11004-11015
- https://doi.org/10.1021/nn404640c
Abstract
We demonstrate that peat moss, a wild plant that covers 3% of the earth's surface, serves as an ideal precursor to create sodium ion battery (NIB) anodes with some of the most attractive electrochemical properties ever reported for carbonaceous materials. By inheriting the unique cellular structure of peat moss leaves, the resultant materials are composed of three-dimensional macroporous interconnected networks of carbon nanosheets (as thin as 60 nm). The peat moss tissue is highly cross-linked, being rich in lignin and hemicellulose, suppressing the nucleation of equilibrium graphite even at 1100 C. Rather, the carbons form highly ordered pseudographitic arrays with substantially larger intergraphene spacing (0.388 nm) than graphite (c/2 = 0.3354 nm). XRD analysis demonstrates that this allows for significant Na intercalation to occur even below 0.2 V vs Na/Na+. By also incorporating a mild (300 C) air activation step, we introduce hierarchical micro- and mesoporosity that tremendously improves the high rate performance through facile electrolyte access and further reduced Na ion diffusion distances. The optimized structures (carbonization at 1100 C + activation) result in a stable cycling capacity of 298 mAh g-1 (after 10 cycles, 50 mA g-1), with \u223c150 mAh g-1 of charge accumulating between 0.1 and 0.001 V with negligible voltage hysteresis in that region, nearly 100% cycling Coulombic efficiency, and superb cycling retention and high rate capacity (255 mAh g -1 at the 210th cycle, stable capacity of 203 mAh g-1 at 500 mA g-1). \ua9 2013 American Chemical Society.Peer reviewed: YesNRC publication: YeKeywords
This publication has 56 references indexed in Scilit:
- Surface-Driven Sodium Ion Energy Storage in Nanocellular Carbon FoamsNano Letters, 2013
- Room-temperature stationary sodium-ion batteries for large-scale electric energy storageEnergy & Environmental Science, 2013
- Tin Anode for Sodium-Ion Batteries Using Natural Wood Fiber as a Mechanical Buffer and Electrolyte ReservoirNano Letters, 2013
- Better Cycling Performances of Bulk Sb in Na-Ion Batteries Compared to Li-Ion Systems: An Unexpected Electrochemical MechanismJournal of the American Chemical Society, 2012
- Microstructural Evolution of Tin Nanoparticles during In Situ Sodium Insertion and ExtractionNano Letters, 2012
- Sodium Terephthalate as an Organic Anode Material for Sodium Ion BatteriesAdvanced Materials, 2012
- Sodium‐Ion BatteriesAdvanced Functional Materials, 2012
- P2-type Nax[Fe1/2Mn1/2]O2 made from earth-abundant elements for rechargeable Na batteriesNature Materials, 2012
- Na2Ti3O7: Lowest Voltage Ever Reported Oxide Insertion Electrode for Sodium Ion BatteriesChemistry of Materials, 2011
- Reversible Sodium Ion Insertion in Single Crystalline Manganese Oxide Nanowires with Long Cycle LifeAdvanced Materials, 2011