Supercapacitor Materials 2017-2027 is a drill down from the IDTechEx overview report, Supercapacitor Technologies and Markets 2016-2026. It has over 200 pages packed with detailed analysis with infograms, conference slides, roadmaps and a ten year forecast 2017-2027. With 78 tables and figures, it is based on global research by PhD level multi-lingual analysts in 2016-7 with frequent updates. The lead author has followed the subject for 20 years and is a globally acknowledged authority on the subject. Indeed, he published the book Dielectrics in 1973. The Executive Summary and Conclusions is insightful, detailed yet easily assimilated. For those with limited time it is sufficient in itself. An introduction focusses mainly on the objectives and challenges with the key components - the active electrodes and electrolytes. Chapters respectively on separators and on electrolytes follow then one on active electrode materials and other important materials. Then there is an extensive chapter on 60 profiled developers and manufacturers.A balanced appraisal explains how in many of the last 20 years they have improved their power density and energy density faster than lithium-ion batteries have done thanks to better hierarchical active electrodes and sometimes exohedral ones plus new electrolytes and so on. However, with its primary focus on the present and future, it shows how new pairings of active electrode and electrolyte materials are now key. Markets of billions of dollars remained elusive, however, due to high price caused by complex processing of basically low cost materials and limited energy density even after all that improvement.The report also explains how, out of the spotlight, very important advances are occurring even beyond market leader Maxwells superlative opening up of new applications with tailored products. In the desert for supercapacitor manufacture - Europe - Skeleton Technologies has started to make supercapacitors partially based on graphene that set the record for power density and Yunasko in the Ukraine set the record for production hybrid supercapacitor energy density - up near lead acid and NiCd batteries and something Nippon Chemical says it will match next year.The report has a global sweep. From ongoing visits, it explains how, recognising the distaste of the Japanese motor industry for highly toxic electrolytes, Nippon Chemical in Japan jumped from nowhere to number two in supercapacitors in the world by making supercapacitors for cars that had benign electrolytes. Supercapacitor Materials 2017-2027 expresses the view that, partly because its supercapacitor suppliers have become more capable, China has recently reversed its policy on traditional hybrid vehicles, declaring that in 2030, 30% of cars made would be hybrids that do not plug in - candidates for supercapacitors. With GM now adopting them, supercapacitors are rapidly taking market share of stop-start systems for conventional vehicles.Supercapacitor Materials 2017-2027 finds that electrolytes with totally new chemistry are pairing well with new exohedral active electrodes. Hybrid capacitors are benefitting from totally new electrolyte-electrode pairings in the laboratory at least. Are the old rules of extremely hydrophobic assembly following complex high temperature processes really necessary for best performance? Everything is being questioned now.