HARARE - Zimbabwe wants miners to come forward by the end of March with plans to produce battery-grade lithium, despite a sharp fall in global prices for the mineral, a senior government official said on Friday.

Africa's top lithium producer Zimbabwe in November gave miners the March deadline to submit plans for the local production of battery-grade lithium, used in electric vehicles and clean energy storage, as it hopes to benefit from a global shift from polluting fuels.

The Chinese miners that dominate Zimbabwe's lithium sector produce concentrates that are shipped to China for further processing.

With global supply of the metal outpacing demand from the battery market over the last year, prices have fallen by more than 80%. In response, many firms have started to cut jobs and curtail output.

In January, the world's top lithium miner Albemarle announced plans to lay off workers and halt expansion. Another U.S. miner, Piedmont Lithium on Feb. 6 said it had laid off 27% of its workforce.

Although some lithium producers in Zimbabwe are reportedly to be struggling for viability at the current price levels, Deputy Mines Minister Polite Kambamura told Reuters the government still wanted miners to put forward firm plans for building processing capacity.

"As government, we are not going backwards on beneficiation. We would like to urge all lithium players to come forward to the ministry with their beneficiation plans," Kambamura said.

"We did not say by March they should have set up these plants, we said they should come up with plans," he added.

One of the miners, Zhejiang Huayou Cobalt, has said it would explore local production battery-grade lithium "only when the construction and economic conditions are right".

Huayou says Zimbabwe lacks resources needed to produce battery-grade lithium, including reliable renewable energy, natural gas and sulphuric acid.

Zimbabwe's hard-rock lithium reserves, some of the world's biggest, have attracted over $1 billion of investment from Chinese miners, including Zhejiang Huayou Cobalt, Sinomine Resource Group, Chengxin Lithium Group, Yahua Group and Canmax Technologies.

(Reporting by Nyasha Chingono; Editing by Nelson Banya and Barbara Lewis)