Electro-Membrane Processes Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific & Industrial Research, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India; Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific & Industrial Research, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India.
Electro-Membrane Processes Division, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific & Industrial Research, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India; Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, Council of Scientific & Industrial Research, Gijubhai Badheka Marg, Bhavnagar 364 002, Gujarat, India.
Adv Colloid Interface Sci. 2017 Feb;240:15-30. doi: 10.1016/j.cis.2016.12.003. Epub 2016 Dec 15.
In the context of many applications, such as polymer composites, energy-related materials, sensors, 'paper'-like materials, field-effect transistors (FET), and biomedical applications, chemically modified graphene was broadly studied during the last decade, due to its excellent electrical, mechanical, and thermal properties. The presence of reactive oxygen functional groups in the grapheme oxide (GO) responsible for chemical functionalization makes it a good candidate for diversified applications. The main objectives for developing a GO based nanohybrid proton exchange membrane (PEM) include: improved self-humidification (water retention ability), reduced fuel crossover (electro-osmotic drag), improved stabilities (mechanical, thermal, and chemical), enhanced proton conductivity, and processability for the preparation of membrane-electrode assembly. Research carried on this topic may be divided into protocols for covalent grafting of functional groups on GO matrix, preparation of free-standing PEM or choice of suitable polymer matrix, covalent or hydrogen bonding between GO and polymer matrix etc. Herein, we present a brief literature survey on GO based nano-hybrid PEM for fuel cell applications. Different protocols were adopted to produce functionalized GO based materials and prepare their free-standing film or disperse these materials in various polymer matrices with suitable interactions. This review article critically discussed the suitability of these PEMs for fuel cell applications in terms of the dependency of the intrinsic properties of nanohybrid PEMs. Potential applications of these nanohybrid PEMs, and current challenges are also provided along with future guidelines for developing GO based nanohybrid PEMs as promising materials for fuel cell applications.
在许多应用领域，如聚合物复合材料、能源相关材料、传感器、“纸状”材料、场效应晶体管 (FET) 和生物医学应用，由于其优异的电学、力学和热学性能，化学改性石墨烯在过去十年中得到了广泛研究。氧化石墨烯 (GO) 中存在的反应性含氧官能团使其成为化学功能化的良好候选物，从而实现多样化的应用。开发基于 GO 的纳米杂化质子交换膜 (PEM) 的主要目标包括：提高自增湿（保水能力）、降低燃料渗透（电渗拖曳）、提高稳定性（机械、热和化学）、增强质子传导性以及制备膜电极组件的加工性能。关于这个主题的研究可以分为以下几个方面：在 GO 基体上接枝功能基团的方案、制备独立的 PEM 或选择合适的聚合物基体、GO 与聚合物基体之间的共价键或氢键等。本文简要综述了用于燃料电池的基于 GO 的纳米杂化 PEM。采用不同的方案来制备功能化的 GO 基材料，并制备其独立膜或在各种聚合物基体中分散这些材料，以实现合适的相互作用。本文从纳米杂化 PEM 的固有性质的依赖性角度，批判性地讨论了这些 PEM 用于燃料电池应用的适宜性。还提供了这些纳米杂化 PEM 的潜在应用和当前挑战，以及未来开发基于 GO 的纳米杂化 PEM 作为燃料电池应用有前景材料的指导方针。
