As the world’s transportation is seeking to switch towards renewable and sustainable sources of energy, the research in fuel cell technology has gained momentum. Proton exchange membrane fuel cell (PEMFC) operating at temperature range 100–200°C (high-temperature proton exchange membrane fuel cells, HT-PEMFCs) has gained interest in their major application to electric power generation. The most promising material is polybenzimidazoles (PBI). Synthesis methods such as condensation polymerization, solid-state or melt polymerization, etc. give the polymer with different inherent viscosity. The monomer modifications both in tetramine and the diacid, reveal variations in glass transition value. Further insight into the membrane casting solvents and methods along with its proton conductivity has been reviewed. Review paper is comprising of Part 1: for the synthesis methods, structural changes, and applications of PBIs in HT-PEMFCs while, Part 2: for the various kinds of PBIs has been discussed.

随着世界运输业寻求转向可再生和可持续能源的发展，燃料电池技术的研究获得了动力。在100-200°C的温度范围内运行的质子交换膜燃料电池（PEMFC）（高温质子交换膜燃料电池，HT-PEMFC）已将其主要用于发电领域引起了人们的兴趣。最有前途的材料是聚苯并咪唑（PBI）。诸如缩聚，固态或熔融聚合等合成方法使聚合物具有不同的固有粘度。在四胺和二酸中的单体改性揭示了玻璃化转变值的变化。审查了对膜浇铸溶剂和方法及其质子传导性的进一步了解。审查文件包括第1部分：