The energy sector’s frantic grab for storage capacity is focused too much on capital cost, according to NGK, which claims that an unsustainable lithium-ion bubble is building without considering product lifetime or environmental impact. In conversation with Rethink Energy, Japanese ceramic specialist NGK cited its sodium sulfur (NAS) battery as a preferable, albeit more expensive solution. An NGK representative reiterated that market conditions currently mean that storage is viewed as a service, rather than an asset, resulting in a sector that is blinkered towards immediate revenue potential. The company believes that ignoring the sustainability of lithium-ion will leave a “market for lemons,” with an absence of higher quality products in the energy storage sector – especially in terms of environmental…