 - A significant step forward for fuel cell technology - Yet another example of JM delivering fuel cell components capable of meeting the most challenging automotive performance targets LONDON, July 27, 2021 PRNewswire -- Johnson Matthey JM, as part of leading European consortium GAIA, has helped deliver a fuel cell power density of 1.8 Wcm2 0.6V. This represents a twenty per cent increase versus state-of-the-art technology. 