In his first State of the Union address, Mr Biden said Russian president Vladimir Putin is more isolated from the world than ever before due to the range of sanctions imposed by Western nations and blocs.

"The free world is holding him (Putin) accountable along with 27 members of the European Union ... as well as countries like the United Kingdom, Canada, Japan, Korea, Australia, New Zealand," he said.

Mr Biden said military, economic and humanitarian assistance would help Ukraine in its "fight for freedom".

"Putin has unleashed violence and chaos. But while he may make gains on the battlefield - he will pay a continuing high price over the long run."

The first 12 minutes of the address focused on the conflict in Ukraine, with Mr Biden announcing the closure of US airspace to all Russian aircraft.

Thirty million barrels of oil from the US strategic reserve will also be released, as will a further 30 million from the reserves of around 30 countries around the world, Mr Biden said.

Australia's Energy Minister Angus Taylor confirmed the country would support the action of the International Energy Agency to release oil stocks to stabilise global markets.

The volume of oil stocks to be released by Australia will be decided and announced in coming days, the minister said.

"The international price of oil is the key determinant of fuel prices in Australia. Releasing additional stocks to the market through globally coordinated action will increase supply, with the aim to avoid a shortfall and ultimately lower petrol prices."

Earlier in the day, the head of Australia's defence force pledged to stand united with other nations in support of Ukraine following the Russian invasion.

In his first public comments since forces invaded Ukraine, Australian Defence Force chief General Angus Campbell said Russia's actions were illegal.

"Your ADF stands with our allies and partners in condemning the unprovoked attack on the people of Ukraine," he said on Twitter.

"Australia will provide military assistance and medical supplies to support Ukraine's defence following Russia's illegal invasion."

It followed Defence Secretary Greg Moriarty meeting with US Deputy Secretary of Defence Kathleen Hicks to discuss the bolstering of information sharing through the new trilateral AUKUS security partnership, which includes the United Kingdom.

Australia's provision of $70 million worth of lethal and non-lethal military aid to Ukraine was also discussed.

The bulk of the package will be used to fund missiles and ammunition, Prime Minister Scott Morrison announced on Tuesday.

A further $35 million will be spent on humanitarian aid, including food, water, medicine and shelter.

Former foreign affairs minister Gareth Evans says as the conflict in Ukraine continues to escalate, the federal government will need to make some "uncomfortable" diplomatic decisions in the interest of justice.

So far Australia has resisted expelling Russia's ambassador and diplomatic staff from the country.

Russian commanders have intensified their infiltration of Ukrainian urban areas, warning Kyiv residents to flee their homes and deploying rockets on the city of Kharkiv.

Satellite imagery has also revealed a Russian convoy of vehicles and tanks stretching over 64km transiting through Ukraine.

Despite contracting COVID-19, Mr Morrison is scheduled to hold talks with his Polish counterpart on Wednesday night followed by discussions with the German chancellor on Thursday.

Defence Minister Peter Dutton said although Russia's mission had so far been frustrated by the "heroic" resistance shown by Ukrainians, the sheer weight of force wielded by Moscow meant a military take over was all but inevitable.

"Hopefully (Russia's) force is repelled eventually - but at the moment, when you see capital cities being encircled, it is difficult to see a different outcome," he told Sky News on Wednesday.

Australian Associated Press