NOVELTY - A composition comprises crosslinked graphene sheets and/or graphite oxide.    USE - As composition in the form of a film (claimed); in applications requiring electrical conductivity, EMI shielding, barrier (such as to the permeation of gases and/or liquids) properties, thermal conductivity, static dissipativity, chemical resistance; for the passivation of surfaces such as metal (e.g. steel or aluminum) surfaces, including exterior structures such as bridges and buildings; in solar cell applications; in solar energy capture applications; in signage, flat panel displays; flexible displays, including light-emitting diode, organic light-emitting diode, and polymer light-emitting diode displays; backplanes and front-planes for displays; and lighting including electroluminescent and OLED lighting, where the displays may be used as components of portable electronic devices, such as computers, cellular telephones, games, GPS receivers, personal digital assistants, music players, calculators, artificial 'paper' and reading devices; in packaging and/or to make labels; in inventory control and anti-counterfeiting applications (such as for pharmaceuticals), including package labels; to make smart packaging and labels (such as for marketing and advertisement, information gathering, inventory control, information display); to form a Faraday cage in packaging, such as for electronic components; on electrical and electronic devices and components such as housings to provide EMI shielding properties; in microdevices (such as microelectromechanical systems (MEMS) devices) to provide antistatic coatings; in the manufacture of housings, antennas, and other components of portable electronic devices, such as computers, cellular telephones, games, navigation systems, personal digital assistants, music players, games, calculators, radios, artificial 'paper' and reading devices; to form thermally conductive channels on substrates or to form membranes having desired flow properties and porosities; to form articles having anisotropic thermal and/or electrical conductivities; to make printed electronic devices that may be in the form of complete devices, parts or sub elements of devices, electronic components; for preparing printed electronic devices; in microwave circuits; diffraction gratings; indicators; chipless tags (e.g. for theft deterrence from stores, libraries); security and theft deterrence devices for retail, library, and other settings; key pads; smart cards; sensors; liquid crystalline displays (LCDs); flexible displays including light-emitting diode, organic light-emitting diode, and polymer light-emitting diode displays; photovoltaic devices, including backplanes; product identifying chips and devices; membrane switches; batteries, including thin film batteries; electrodes; indicators; printed circuits in portable electronic devices (e.g. cellular telephones, computers, personal digital assistants, global positioning system devices, music players, games, calculators); electronic connections made through hinges or other movable/bendable junctions in electronic devices such as cellular telephones, portable computers, folding keyboards); wearable electronics; and circuits in vehicles, medical devices, diagnostic devices, instruments; in radiofrequency identification (RFID) devices for tracking shipping containers, products in stores, products in transit, and parts used in manufacturing processes; passports; barcode replacement applications; inventory control applications; pet identification; livestock control; contactless smart cards; and automobile key fobs.    ADVANTAGE - The composition has an electrical conductivity of at least about 10 S/cm or at least about 102 S/cm. The composition has no polymer binder. The composition comprises graphene sheets having improved properties such as electrical conductivity, thermal conductivity, barrier properties, stiffness, and strength. The composition exhibits good physical properties such as electrical conductivity i.e. has conductivity of at least about 10-8 S/m; has surface resistivity of not greater than 10000 Omega /square; and has thermal conductivity of about 0.1 to about 50 W/(m-K).    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of making composition involving crosslinking graphene sheets and/or graphite oxide.