Researchers at Deakin University have developed a hydrometallurgical process recovering 95% of lithium, cobalt, and nickel from spent lithium-ion batteries. The process uses lower temperatures and less hazardous chemicals than current recycling methods, making it more environmentally friendly and economically viable. The development addresses growing battery waste concerns as electric vehicle adoption accelerates.

Australia currently exports most waste batteries to Asia for recycling, an economically and environmentally questionable practice given transport emissions and uncertain processing standards overseas. Establishing domestic recycling capability would retain valuable materials within Australia while creating local jobs and reducing environmental risks.

Process Overview

The Deakin process dismantles batteries and separates components mechanically before chemical processing. Plastic casings, steel frames, and aluminium packaging are recovered through conventional recycling. The electrode materials containing valuable metals undergo leaching with dilute sulfuric acid and hydrogen peroxide. These reagents dissolve metals while being less corrosive and toxic than strong acids used in some existing processes.

Dissolved metals are separated through selective precipitation and solvent extraction. Lithium carbonate, cobalt sulfate, and nickel sulfate are produced at purities suitable for manufacturing new batteries. The process avoids high-temperature pyrometallurgical steps that consume substantial energy and generate air emissions. Operating at temperatures below 80 degrees Celsius reduces energy costs and environmental impact.

Recovery Efficiency

Laboratory testing using batteries from various manufacturers achieved lithium recovery rates of 94-96%, cobalt recovery of 96-98%, and nickel recovery of 95-97%. These rates substantially exceed many commercial recycling processes currently achieving 80-85% recovery. Higher recovery means more value extracted from waste batteries and fewer metals lost to residues requiring disposal.

The process also recovers graphite from battery anodes, though commercial markets for recycled graphite remain limited. Natural graphite costs less than recycling currently achieves. However, graphite supply constraints might emerge as battery production grows, potentially making recycled graphite economically attractive. For now, recovered graphite has limited value but at least doesn’t create disposal problems.

Economic Viability

Cost modelling suggests that a recycling facility processing 5,000 tonnes of waste batteries annually could operate profitably given current metal prices. Capital costs for a facility of this scale total approximately $15-20 million. Operating costs including chemicals, labour, and energy total roughly $4,500 per tonne processed. Revenue from recovered metals exceeds $6,000 per tonne at current prices, providing adequate margins.

However, profitability depends on collecting sufficient waste battery volumes and metal prices remaining favourable. Battery waste generation is growing rapidly as early electric vehicles reach end-of-life, but current volumes remain limited. Facilities must plan for growth while achieving viability at initial smaller scales. This scaling challenge affects financial risk for pioneering facilities.

Environmental Assessment

Lifecycle analysis shows that recycling batteries produces 60% lower greenhouse gas emissions than mining and processing virgin materials. Water consumption is 50% lower, and solid waste generation drops by 70%. These environmental benefits strengthen as electricity grids decarbonise, since mining and primary metal processing are energy-intensive.

The chemicals used in recycling require proper management to prevent environmental releases. The dilute sulfuric acid and hydrogen peroxide used in the Deakin process present lower risks than some alternatives, but still require neutralisation and treatment before discharge. The facility design includes wastewater treatment systems ensuring compliance with environmental regulations.

Scale-Up Challenges

Moving from laboratory beakers to industrial tanks introduces engineering challenges. Controlling reaction temperatures, mixing, and chemical concentrations becomes more complex at scale. The research team is designing a pilot facility processing 50-100 kilograms of batteries daily to demonstrate scale-up feasibility before pursuing commercial deployment.

Materials handling presents particular challenges. Batteries contain residual electrical charge creating fire and explosion risks if short-circuited during dismantling. Automated discharge and disassembly systems mitigate these risks but add complexity and cost. Safety procedures and equipment design critically affect facility viability and worker safety.

Battery Collection Logistics

Recycling facilities require steady feedstock supplies. Currently, waste batteries are distributed across Australia with no systematic collection infrastructure. Establishing collection networks involves coordination with retailers, automotive service centres, and waste management companies. Logistics costs for collecting and transporting batteries from dispersed sources significantly affect overall process economics.

Several states have proposed battery stewardship schemes requiring manufacturers to fund collection and recycling. These schemes would create reliable waste streams for recycling facilities while removing collection costs from recycler business models. However, national implementation remains uncertain, creating investment risk for would-be recycling facility operators.

Competitive Landscape

Several companies are developing battery recycling capabilities in Australia. Envirostream operates a facility in Melbourne using pyrometallurgical processing. Neometals is pursuing a different hydrometallurgical approach in Western Australia. The market can likely support multiple recyclers given projected battery waste volumes, though competition will drive efficiency improvements and cost reductions.

International recycling companies are also eyeing the Australian market. Chinese, Korean, and European recyclers have expressed interest in establishing Australian operations. Domestic technology development like the Deakin process ensures that Australian companies can compete with international players and retain value within Australia rather than becoming dependent on foreign recycling services.

Battery Design Implications

Current batteries aren’t designed for easy recycling. Electrode materials are glued to current collectors. Cells are sealed in hard-to-open metal cans. Disassembly is labour-intensive and sometimes dangerous. Future battery designs could incorporate features simplifying disassembly and material separation, reducing recycling costs substantially.

Regulatory requirements for recyclability could drive design improvements. The European Union is implementing battery regulations requiring minimum recycled content and design for recyclability. Australian regulations might follow similar paths. Such requirements would make battery recycling more economically attractive by reducing processing costs and guaranteeing feedstock availability.

Metals Markets

Battery metal prices fluctuate substantially, affecting recycling economics. Lithium prices peaked in late 2022 above $70,000 per tonne before crashing to $10,000 per tonne in 2024. Prices have since stabilised around $15,000-20,000 per tonne. This volatility creates business risk for recycling operations with fixed costs but variable revenue.

Long-term contracts with battery manufacturers could stabilise revenue by fixing prices for recycled materials. Several battery makers have expressed interest in securing recycled material supplies to improve supply chain resilience and meet environmental targets. These offtake agreements would reduce market risk for recycling facilities while giving manufacturers reliable access to recycled materials.

Workforce Development

Battery recycling requires chemistry, chemical engineering, and materials science expertise. Australia has capable workforce pools in these areas, though specific battery recycling knowledge is limited. Deakin is developing training programmes preparing workers for recycling industry careers. Initial facilities will likely hire generalists and provide on-the-job training until educational programmes produce graduates with relevant specialisation.

Safety training is particularly important given the fire and chemical hazards involved. Workers must understand battery safety, chemical handling, and emergency response procedures. Industry groups are developing safety standards and training curricula ensuring consistent safety practices across facilities.

Commercial Pathways

Deakin is negotiating with potential commercial partners to license the technology. Several scenarios are being considered: licensing to existing waste management companies, forming a startup to operate recycling facilities, or joint ventures with battery manufacturers. Each pathway has advantages and risks that must be weighed carefully.

The university aims to reach licensing agreements by mid-2026, enabling pilot facility construction to begin by 2027. Commercial operations could start by 2028-2029 if development proceeds smoothly. However, permitting, financing, and construction challenges could extend this timeline. Success depends on coordinating technical readiness with market conditions and policy frameworks.

Policy Support

Government support through grants, loan guarantees, or purchase commitments could accelerate recycling industry development. Such support carries risks of backing uncompetitive technologies but can help overcome the investment uncertainty facing pioneering facilities. Several industry groups are lobbying for government assistance, arguing that battery recycling capability has strategic value beyond purely commercial considerations.

The federal government’s critical minerals strategy identifies battery metals as priorities. Supporting domestic recycling aligns with this strategy by creating secondary supply sources reducing import dependence. Whether this strategic consideration translates to concrete financial support remains to be seen. Political priorities shift, and government budgets face many competing demands.

The Deakin battery recycling development demonstrates Australian research capability in addressing practical environmental challenges. The path to commercial deployment involves technical scale-up, business model development, and policy framework evolution. Whether Australia establishes substantial domestic battery recycling capability or continues relying on overseas processing will be determined over the next 3-5 years as these factors evolve and align or fail to do so.