Filamentous organism-derived carbon-based materials, and methods of making and using same
The invention provides filamentous organism-derived carbonaceous materials doped with organic and/or inorganic compounds, and methods of making the same. In certain embodiments, these carbonaceous materials are used as electrodes in solid state batteries and/or lithium-ion batteries. In another aspect, these carbonaceous materials are used as a catalyst, catalyst support, adsorbent, filter and/or other carbon-based material or adsorbent. In yet another aspect, the invention provides battery devices incorporating the carbonaceous electrode materials.
1. A carbonaceous material comprising a graphitic, partially graphitic, or amorphous carbon matrix, wherein the carbon matrix comprises a plurality of fibers,
wherein each one of the plurality of fibers independently has a diameter ranging from about 0.1 μm to about 100 μm and is in physical contact with at least one other of the plurality of fibers;
wherein the carbon matrix has a surface area ranging from about 1 m 2 g −1 to about 3,000 m 2 g −1 ; and
wherein the carbon matrix comprises a plurality of pores that are present throughout the carbon matrix, wherein each one of the plurality of pores independently has a diameter ranging from about 0.1 μm to about 1 cm and is in fluid connection with at least one other of the plurality of pores.
2. The carbonaceous material of claim 1 , which is prepared by carbonizing a filamentous organism optionally grown in the presence of at least one organic or inorganic compound wherein, if present, at least a portion of the at least one organic or inorganic compound is within or on the surface of the carbon matrix.
3. The carbonaceous material of claim 2 , wherein the filamentous organism is at least one selected from the group consisting of a filamentous algae, filamentous fungus and filamentous bacterium.
4. The carbonaceous material of claim 2 , wherein the filamentous organism is wild type or genetically modified Neurospora crassa.
5. The carbonaceous material of claim 2 , wherein at least one applies: (a) the filamentous organism is carbonized by heating to a maximum temperature of about 100° C. to about 2,500° C.; (b) the filamentous organism is heated from room temperature to the maximum temperature at a rate of about 1° C./min to about 100° C./min; (c) the filamentous organism is heated at the maximum temperature for about 1 hours to 100 hours; (d) the filamentous organism is heated in the presence of a gas with a flow rate between about 1 mL/min and about 1000 mL/min; (e) the filamentous organism is heated in a vacuum.
6. The carbonaceous material of claim 1 , wherein at least one of the plurality of fibers (a) is not physically bound to any of the others of the plurality of fibers, or (b) is physically bound to at least one other of the plurality of fibers.
7. The carbonaceous material of claim 1 , wherein at least one of the plurality of fibers is physically bound to a first other of the plurality of fibers through a first branching point and physically bound to a second other of the plurality of fibers through a second branching point, wherein the separation of the first and second branching points along the length of the at least one of the plurality of fibers ranges from about 0.1 μm to about 1000 μm.
8. The carbonaceous material of claim 1 , wherein the carbon matrix further comprises at least one organic or inorganic compound that is within or on the surface of at least a fraction of the plurality of fibers and is present throughout the carbon matrix.
9. The carbonaceous material of claim 8 , wherein at least one applies: (a) the at least one inorganic compound is selected from the group consisting of transition metal salts, alkali metal salts, alkaline earth metal salts, nitrate salts, sulfate salts, phosphate salts, metal particles, metalloid particles, metal oxides; (b) the at least one inorganic compound is selected from the group consisting of cobalt nitrate, sodium nitrate, magnesium sulfate and silicon nanoparticles.
10. The carbonaceous material of claim 1 , wherein each one of the plurality of pores independently has a diameter ranging from about 1 μm to about 10 mm.
11. The carbonaceous material of claim 1 , wherein at least one applies: (a) the material further comprises comprising a compound selected from silicon nanoparticles, silicon oxide nanoparticles and Co 2 O 3 nanoparticles; (b) the material is suitable for use as an electrode; (c) the material is suitable for use as an electrode in a solid state battery or a lithium-ion battery.
12. A battery device comprising the carbonaceous material of claim 1 and a lithium-containing electrolyte.