Global lithium ion battery market was worth $17.4 billion in 2017, and is expected to reach around $95 billion by 2025

Energy storage allows for flexibility in the timing of when energy is supplied and when it is used. Energy storage comes in a number of forms, including chemical, kinetic, thermal, gravitational potential, electromagnetic, electrochemical and osmotic potential. The choice of storage solution depends on location as well as reserve service required, since different technologies can provide different capacities and durations of storage. Storage of solid, liquid and gaseous fuels has been commonplace for centuries; as the low carbon transition requires integration of increasing intermittent renewable sources into the system, energy storage is becoming integral for reducing dependency on fossil fuels and achieving a flexible, resilient energy network. Strategic placement of storage also gives the potential to avoid otherwise necessary network upgrades and curtailment of expensive assets. Greater connectivity between different energy networks, i.e. interconnection across national grids, can allow for security of supply without needing additional generation capacity.

Energy storage has applications varying from small-scale local systems in homes or commercial buildings – which are becoming increasingly common alongside the rise of distributed generation – to utility-scale storage systems. Common examples of energy storage include batteries (mainly lithium-ion) which store electricity as chemical energy, pumped hydroelectric storage systems which store gravitational potential energy in elevated reservoirs, and ice storage tanks which store thermal energy by freezing water with cheaper energy at night to meet peak cooling demand in daytime. Surplus renewable electricity can also be used to produce energy carriers like hydrogen, enabling the storage of renewable energy for long periods. Electric vehicles can also function as storage systems, since electricity can be transferred both to and from the batteries of plugged-in vehicles when needed. With energy storage expected to play a greater role towards a low-carbon and sustainable energy future, various storage technologies must be evaluated to balance the trade-offs between life-cycle cost, efficiency, material sustainability and safety.

Read our Energy World articles on how energy storage fits into strategies for carbon reduction.

Learn more about storage by reading our Energy Insights.

Learn about recent public funding for research and development of energy storage on our policy milestone website.

What's new?

Predicting well-stimulation results in a gas-storage field in the absence of reservoir data with neural networks. S. Mohaghegh et al. SPE Reservoir Engng., November 1996, 11(4), 268--272.

Methodology is presented that is capable of forecasting the post fracture deliverability on the basis of historical data in Clinton sandstone gas-storage field without detailed reservoir data. Post fracture well deliverability was predicted with approximately 95% accuracy. The neural network develop...

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Electricity Storage Network Consultation Document 2014

This report demonstrates the need for electricity storage in the UK and how it can form a valuable part of our national electrical infrastructure. The intention is to select a specific recommendation, from the four proposals outlined in this document, that could be given to DECC, DETI and regulatory...

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Events and training

Energy Policy Debate: The first 100 days of a new Government and its energy policy

21-04-2020
At this Energy Policy Debate, expert speakers will discuss key progress/decisions made in energy by the Government so far.

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Aviation Jet Fuel - Dubai - June 2020

15-06-2020
This 2-day training course will provide delegates with an overview of aviation jet fuel, focusing on the jet engine, its underlying principles and fuel requirements as well as the critical characteristics of jet fuel, including additives, Industry best practice adopted in the supply, handling and us...

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Aviation Jet Fuel - September 2020

29-09-2020
This 3-day training course will provide delegates with an overview of aviation jet fuel, focusing on the jet engine, its underlying principles and fuel requirements as well as the critical characteristics of jet fuel, including additives, Industry best practice adopted in the supply, handling and us...

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Electrification for Net Zero

8-10-2020
A number of countries are making commitments to move to a net zero emissions economy. There are many ways to help bring emissions to net-zero which will be discussed during this conference. 

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Hazardous Area Classification - October 2020

12-10-2020
This 2-day training course will provide delegates with training on the Energy Institute Model Safe Code of Practice 15, Area Classification for Installations Handing Flammable Fluids. This internationally recognised publication provides methodologies for carrying out Hazardous Area Classification st...

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Technical guidance publications

Battery storage guidance note 2: Battery energy storage system fire planning and response

2020
This publication is free to download. Please log in to see the download option.This publication provides guidance on how to respond to BESS fires. It represents the 'current state' of knowledge (in 2019), but also identifies gaps in knowledge. The guidance covers primarily non-domestic battery insta...

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HM 93. A guide to manual sampling of hydrocarbon liquids

2020
Anyone involved in oil production, transportation, refining, storage or distribution will be aware of the importance of sampling and testing to ensure that crude oil and products meet the required specifications. This guide provides practical advice on sampling of hydrocarbon liquids across a wide r...

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Guidance on human factors safety critical task analysis

2020
This publication is free to download, please log in to see the download option.The first edition of Guidance on human factors safety critical task analysis filled a gap by enabling companies and human factors (HF) non-specialists to conduct quality HF analyses in a structured and consistent format. ...

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EI Research report: Process hazard analysis of an aviation fuel hydrant system

2020
This EI Research report is intended to assist all those involved in the design, construction, operation, inspection and maintenance of aviation fuel hydrant emergency shutdown systems and all companies involved in the fuelling of commercial aircraft with jet fuel. It reports the findings of a P...

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HM 68. Procedures for bulk liquid fatty acid methyl esters (FAME) and blended biodiesel cargo inspections

2020
This document provides procedures for minimising cargo contamination and losses. It will be for use primarily by cargo inspectors and should be considered as a summary of best practices used within the industry.The document is applicable to bulk liquid fatty acid methyl esters (FAME) for use as fuel...

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